Objective-C Programming: The Big Nerd Ranch Guide (Big Nerd Ranch Guides) (9780321706287): Aaron Hillegass, Mark Fenoglio. Clean Code: A Handbook of Agile Software Craftsmanship (9780132350884): Robert C. Martin. Cocoa Programming for Mac OS X (4th Edition) (9780321774088): Aaron Hillegass, Adam Preble. Programming in Objective-C (4th Edition) (Developer's Library) (9780321811905): Stephen G. Kochan.