This is a book about abstract algebra: http://abstract.ups.edu/
This is about methods of proof: http://www.people.vcu.edu/~rhammack/BookOfProof/index.html
This is about linear algebra: http://joshua.smcvt.edu/linearalgebra/

Recent books are preferred but time-tested old ones also work; many books are available in DJVU format (with better quality and file-size than PDF) and to read them you'll need this: http://www.caminova.net/en/downloads/download.aspx?id=1

[Edited on March 2, 2011 at 8:53 PM. Reason : This is a start: http://www.e-booksdirectory.com/listing.php?category=3

3/2/2011 8:38:54 PM

uh, why aren't they published in epub or mobi then? i've never heard of DJVU

message_mytopics.aspx?add=609776

3/2/2011 9:49:09 PM

This isn't really "open", but it is a complete text book. It's kinda high level though.

Passive Microwave Remote Sensing of the Earth
http://www.iki.rssi.ru/asp/pub_sha1/pub_sha1.htm

3/2/2011 9:54:57 PM

so much information

so little time

[Edited on March 2, 2011 at 9:58 PM. Reason : can a brother PLEASE get a matrix-style knowledge upload technology now plz]

3/2/2011 9:58:06 PM

^^^All of the ones linked from e-booksdirectory.com that are available in DJVU are hosted on archive.org, which also makes them available in PDF, plain-text, ePub, Mobi, Daisy, and even a Web-based OpenLibrary stream; it's just that DJVU is more space-efficient (it's relatively popular among mathematics publishers for this reason).

Also I just made a CHM version of Eloquent JavaScript: http://www.multiupload.com/AXJYYP6QHR

[Edited on March 2, 2011 at 10:08 PM. Reason : originally from here: http://eloquentjavascript.net/

3/2/2011 10:07:26 PM

Structure and Interpretation of Computer Programs. It's the Gravity's Rainbow of intro to CSC texts.

3/7/2011 12:17:35 AM

This thread...

3/7/2011 11:17:01 AM