Other open access logic books
I realized today that forall x is almost ten years old. I wrote it in the summer of 2005, mostly at the Peet's on Villa La Jolla Drive, and released version 1.0 on July 13 of that year.
I recently heard about A Concise Introduction to Logic, a book that Craig DeLancey of SUNY Oswego is for the OpenSUNY initiative. When they did their call for proposals, forall x wasn't eligible because it had the demerit of already existing!
I learned today about the Open Logic Project, masterminded by Richard Zach (Calgary) with an all-star list of editors and contributors. Unlike forall x, it's an intermediate level book.
Zach and company are using Github to automate bug reports and feature requests, which is an idea I really like. The LaTeX source files of forall x are freely available and it has forked multiple times, but I still maintain the original version on my own computer. I occasionally get corrections and requests, but by e-mail. Alas, I suspect most users of forall x are not the sort of people who would submit corrections and requests that way anyhow.
Tue 05 May 2015 09:23 AM