Charles petzoid for linux/mac

[beakie]

Windows programming 5th edition. Is there something similar?

[shadow123]

Look around at http://tldp.org
You should find there enough information.

[Moschops]

Kerrisk's "The Linux Programming Interface" is good.

[z05DSL3A]

For Mac (Objective-C):

http://www.bignerdranch.com/books