Barnes and Noble carries AI4U: Mind-1.1 Programmer's Manual -- the Mentifex AI textbook or general-reader AI book that describes the Mind-1.1 release of the public-domain free AI source code for artificial intelligence (AI).

Although the Mind-1-1 JavaScript AI source code is listed in full at the back of the AI4U book, it is not necessary to type in the listing or to scan it in with optical character recognition (OCR), because clicking on the Web link and choosing "View... Source" provides the same source code listing as in the AI4U book.

The AI4U book is a publish-on-demand (POD) paperback from iUniverse.com, an outfit that fills a book-order by printing out and shipping a copy of a book.

BookCrossing.com is a website that enables you to leave copies of say, AI4U, lying around where interested parties may find the book, notice the BookCrossing label and use the identifying number to report where they have found the AI4U book and what they have done with it. All in all, BookCrossing is a way to get AI4U or other books into high-velocity circulation so as to spread the memes of public-domain artificial intelligence (as with AI4U) or of any subject matter important to you :-)