The Linux Programming Interface: A Linux and UNIX* System Programming Handbook - Michael Kerrisk
Head First Python - Paul Berry
Programming Clojure - Stuart Halloway
Programming in Objective-C 2.0 - Stephen Hochnan
Beginning iPhone 3 Development - Dave Mark
Grey Hat Python
The C Pocket Reference
Used to have the Perl Cookbook but I think I gave that one away because I can't find it.