Core Book Discounted to $65. Big Nerd Ranch announces a newly discounted price on its widely acclaimed Core Mac OS X and Unix Programming, co-authored by Mark Dalrymple and Aaron Hillegass. Since its release in 2003, the student guide, born out of the Big Nerd Ranch class by the same name, has become a fundamental introduction to programming in Mac OS X. [Meerkat: An Open Wire Service]