The latest user-submitted review:	Love for Manufactured Things, The, reviewed by Ben Crowell
The latest book to be entered in the database:	Gentle Introduction To Haskell, Version 98, A, by Paul Hudak,John Peterson,Joseph Fasel
A random free book:	O+F

Welcome The Assayer is the web's largest catalog of books whose authors have made them available for free. Users can also submit reviews. The site has been around since 2000, and is a particularly good place to find free books about math, science, and computers. If you're looking for old books that have fallen into the public domain, you're more likely to find what you want at Project Gutenberg. You can browse the catalog by clicking on a link in the bar above. You need to become a member if you want to post your own reviews, add books to the database, or participate in discussions of books. Click here to become a member. Membership is free, and the only personal information you need to give is your e-mail address. (We won't spam you, and other visitors will only be able to see your address if you say it's OK.) Members can also reply to each other's reviews, creating a discussion of a book, and can choose to receive e-mail notifications when new discussion has occurred about a particular book. Click on the Help link above for more detailed information on the purpose of The Assayer and how to use it.

Flat World Knowledge Flat World Knowledge is a new startup company that is distributing CC-BY-NC-licensed textbooks via free digital downloads and print on demand. Professors can produce customized versions of the texts by, e.g., cutting chapters they don't intend to cover, and can edit "down to the sentence level." They're currently at the testing stage, and plan a full commercial launch in 2009. There doesn't seem to be any information on their site about what books they've got lined up. The restriction to the CC-BY-NC license seems unfortunate to me, since it locks out a whole body of books that are licensed under CC-BY, or under licenses like the GFDL (used, e.g., by Wikipedia) that are compatible with CC-BY. April 25, 2008 Open Text Book Open Text Book is a new web site that catalogs textbooks that are free-as-in-speech. October 4, 2007 Manybooks Manybooks is a web site for free books, as well as shorter works. They seem to have started by converting the books on the Project Gutenberg DVD into a variety of convenient formats. In addition, they have a pretty good catalog of science fiction novels and short stories whose authors have made them free online. September 15, 2007 Scribd Scribd is a new service that aims to do for the print medium what youtube did for video. It could be a useful no-cost, no-hassle way for authors of free books to distribute them online, without having to maintain their own web sites. Books are automatically translated into a variety of formats, and by default users are shown a flash interface that lets them flip through the book page by page. My own experience with Mac/Linux/Firefox was that the flash interface didn't work very well, but YMMV, and I'm sure the glitches will get worked out over time. August 11, 2007 Ink Textbooks Ink Textbooks is a new textbook publisher that plans to sell books inexpensively in print, and also make the same books available for free online in digital form. They require an exclusive license from the author, so their system isn't compatible with Creative Commons or GFDL-licensed books. July 28, 2007 Free Curricula Center The Free Curricula Center is a new project that is going to try to get people to cooperate on writing free textbooks. Mar. 23, 2006 An Infrastructure for Free Books Here is an article I wrote about what's going on these days in the world of free books. From the article: With the cost of college textbooks up 62% over the last decade, pressure is building for an alternative model of publishing: the free book. Five years ago, an author had to be very persistent --- maybe even a little crazy --- to try the new approach. But now a whole new infrastructure is springing up to make it easier. Dec. 15, 2005 1000 Free Books The Assayer's catalog has now passed the milestone of 1000 free books. Dec. 12, 2005 A Proposal For Governnment-Financed Textbooks The Center for Economic and Policy Research has published a proposal for the government to finance the production of textbooks, on the condition that they would then be placed into the public domain. Personally, it raises my libertarian hackles, but it's true that one of my favorite physics textbooks, PSSC Physics, was created as a government-financed project. June 22, 2005 CALPIRG Cheaper Textbooks Campaign Lindsay Hopkins (lindsay dot hopkins at gmail dot com) contacted me today about the CALPIRG Cheaper Textbooks Campaign, of which she's the statewide coordinator. CALPIRG, the California Public Interest Research Group, is an organization of students in the University of California System. Their Cheaper Textbooks Campaign is interested in putting together a how-to manual on writing your own free textbook. Apr. 21, 2005 Free Textbook Project I've been contacted by Joshua Gay about a new endeavor called the Free Textbook Project, which looks very promising. Apr. 8, 2005 Real Names Now Required I've been seeing an increasing number of "reviews" that are actually the author's promotional blurb. These are usually painfully obvious, and I delete them immediately. However, I've decided to start requiring new users to supply their real names when they set up an account. Of course, there's nothing to stop them from faking this information. When you read a review, think critically about whether the reviewer appears trustworthy. It's usually a sign of trouble if the reviewer has only ever written a single review on The Assayer, and the review reads like promotional material. Dec. 16, 2004 3000th Member The Assayer's membership passed the 3k mark with member jameslee. Thanks, everybody, for all of your continuing contributions to The Assayer! Aug. 10, 2004 No New Non-Free Books When I first created The Assayer, I decided as an afterthought to allow people to review non-free books here. I didn't want to come off as a fire-breathing zealout, and I thought an exclusionary policy toward non-free books might cause a lot of arguments about what qualified as free. Since then, the site's catalog of free books has grown greatly, and gradually more and more of them are getting reviewed by TA members. It's become clear to me, however, that accepting reviews of non-free books is not producing anything worthwhile (Amazon.com is the venue for that), and is taking up a lot of my time and resources. In particular, there have been a lot of cases where the authors of a non-free book posted thinly veiled promotional material in the guise of a review. I've also noticed that at least one person has cross-posted reviews here and on Amazon.com, despite the prominent warnings on this site not to do that because Amazon owns the copyrights on reviews submitted to them. That creates a potential for legal problems that I don't need. Therefore I've decided to stop accepting new reviews of non-free books. Reviews of non-free books that are already in the database will be retained, except in cases where they appear to violate Amazon's copyright. (Note added Oct. 2005: It appears that Amazon.com no longer claims copyright on reviews, but only a royalty-free license to use them.) Feb. 15, 2004 New Subject Categories The number of books in Library of Congress category QA, math and computer science, is getting huge, so I've introduced smaller subcategories, which you'll see when you browse by subject. I've done my best to place as many math and computer books as possible in appropriate subcategories, but some of them get pretty esoteric, so feel free to help out if you have the necessary expertise; to place a book in a subcategory, just click on its "edit information about this book" link, and it will show you the legal choices. Jan. 11, 2004 Warning Messages Eliminated I didn't receive any more comments about the warning messages (see below). I've decided to eliminate them. Nov. 8, 2003 Comments on Warning Messages? I recently added a feature to The Assayer that some might consider a bug :-) When you're viewing a review, you get an error message if the reviewer hasn't supplied a real name, hasn't supplied a bio, or has only every written one review. One user of the Assayer has e-mailed me to say he hates the warnings. Does anyone else have comments? The warnings are meant to handle a situation that is unfortunately pretty common: the author of a book submits a review of his own book. Am I overreacting? Let me know! Click on the contact link above for info on how to e-mail me, and please let me know if it's OK to quote you and use your name in this space. Based on the one user's feedback, I've already made the warnings less prominent. Two Licenses Eliminated I've decided that it was a bad idea to create two of my own homebrewed licenses for reviews, and I will no longer be accepting new reviews under these licenses. I think the proliferation of licenses is a bad thing, and I'm also not a lawyer, so I don't know if these licenses have legal defects. The default license for reviews is still the OPL without options A and B. This may seem strange, since its creator, Dave Wiley, recommends using a Creative Commons license for new works instead of the OPL. However, it seems to me that the OPL is more appropriate for book reviews, because it requires modified versions to be given out with a description of the modifications, which is important in order to keep people from changing a reviewer's words to misrepresent the reviewer's opinions. Aug. 29, 2003 OpenContent Shuts Down Dave Wiley, a pioneer in the application of copyleft licenses to non-software publications, is now recommending that people use Creative Commons licenses instead of the Open Publication licenses (OPL). The OpenContent.org site will remain up, and still has the text of the Open Publication licenses. Open E-Book Format Proposed Here are some links discussing a recent proposal for an open format for e-books: [1], [2], [3], [4]. Jun. 5, 2003 GFDL not free? There's been some discussion about whether the GFDL license actually fails to qualify as a true free-information license. Apr. 24, 2003 Internet Book List Internet Book List is a new site for user-submitted book reviews. It's been discussed on Slashdot. Mar. 7, 2003 Books as Sewage? Arnold Kling has an article with a skeptical take on the idea of free-information publishing. It's been discussed on Slashdot. Jan. 15, 2003 An Article About Free Books Here's an article I wrote about what's new in the world of free books. It was recently discussed on Slashdot. Oct. 21, 2002 1000th Member Joins The Assayer The Assayer's membership moved into four-digit territory. Go team! May 3, 2002 Green Tea Press It used to be that if you made a list of publishers who understood free information, there was only one: O'Reilly. That's changed a little, e.g., Addison-Wesley has print-published Programming Ruby, which is also free in digital form. But even so, any addition to this short list is newsworthy. Green Tea Press is a new print publishing house started up by Lisa Cutler and Allen Downey, one of the authors of How to Think Like a Computer Scientist, a wonderful book which also happens to be free in digital form. It's good to see an initiative like this coming from an author, and it will be interesting to see if the digitization of the publishing industry leads to a more author-centered approach. Best wishes go out to Lisa and Allen in their new endeavor! Feb. 11, 2002 New Licenses For Reviews Based on requests from users, I've added two more options for the licenses of reviews: a BSD-style license called the Free Word license, and another called the Soapbox license, which is intended for use with writing that expresses opinions, in order to ensure that it can't be modified so as to misrepresent the opinions of the original author. Both of these are homebrewed licenses. The Free Word is really nothing but the BSD license, with a couple of minor changes to adapt it to writing that isn't software. The Soapbox license is my attempt to address reviewers' concerns, without going as far as a verbatim-copying-only license, which I think would be inappropriate for a free-information site like The Assayer. Feb. 1, 2002 TA's Most Prolific New Member The Assayer has a prolific new reviewer! Check out the eclectic work of voiceofthewhirlwind, with reviews on topics from history to crime fiction to technology. Jan. 18, 2002 More Choices of Licenses? A TA user e-mailed me recently to suggest adding a third license to the menu you choose from when submitting a review. His concern was that both the GFDL and the OPL allow modification, which might allow people to make it sound as though you said things you didn't. Although both licenses require changes to be documented, the concern is a valid one, since TA deals with opinion, not software documentation, which is what GFDL in particular is tuned up for. Would it be a good thing to have a third choice, basically saying that the review can be copied but not modified? If you have comments, please e-mail them to me at crowell02 at lightandmatter.NOSPAM.com, and I'll post them on TA. B. Crowell, Jan. 18, 2002 User Lucas Walter says "I was going to suggest the same thing, maybe add OPL _with_ option A (minor alterations permitted, but no semantic changes)." Jan. 18, 2002 Another possibility, for those who prefer it, is a BSD-style license of some kind. IMHO this is more free than GPL-style licenses such as the GFDL and OPL-without-options, although "freer" isn't necessarily the same as better :-) B. Crowell, Jan. 18, 2002 The Assayer Featured in Indian Newspaper The Assayer was prominently featured in a recent article in the Indian newspaper The Hindu. A big thank you goes out to reporter J. Murali! July 19, 2001.

The contents of this web page, except the parts contributed by members of The Assayer, are copyright (c) 2000 by Benjamin Crowell, and are copyleft licensed under the Open Publication License 1.0, without options A or B.