The Art of Unix
http://www.faqs.org/docs/artu/
Perl for Impatient Developer
http://blob.perl.org/books/impatient-perl/iperl.pdf
Game Development with Javascript
Introduction to x64 Assembly
http://software.intel.com/en-us/articles/introduction-to-x64-assembly/
Database Fundamental
https://www.ibm.com/developerworks/wikis/display/db2oncampus/FREE+ebook+-+Database+fundamentals