I recently read "Linux Programming by Example," by Arnold Robbins. I loved this book. It's earned an honored place on my bookshelf, and I'm going to recommend it to people who need information about Linux and UNIX development.

Many computer books are practically obsolete before they ship: within a few months, "Learn Foomatic 4.3 in 21 Days" is in the bargain bin at the Dollar Tree. Some books have longer lives, and a few can remain useful for years. "Linux Programming by Example" (LPE) is in this last category; this book can stand alongside Steven's "Advanced UNIX Programming" as an essential tutorial and reference.

LPE covers everything you'd expect (working with files, processes, signals, users) and some things you might not (internationalization). But it's this book's voice and unique perspective that make it truly a gem. LPE is written in a clear, friendly, authoritative style. As I read, I often felt that I had gained a new understanding of things I've known for years.

The long and twisted history of UNIX has given rise to multiple competing APIs. Perhaps the greatest thing about this book is the way that Robbins cuts through these thickets, explaining your choices, pointing out the best alternatives, and explaining why they're the best. LPE's modern vantage point means it can cover V7, BSD, POSIX, and GNU APIs. The chapter on signals alone is worth the purchase price of the book for the way in which it clearly compares and contrasts the various signal APIs.