If you're looking for a good book on SPARC Assembler--I wouldn't recommend the SPARC Architecture reference manual. It's exactly that--a reference manual. Here's my recommendation: SPARC Architecture, Assembly Language Programming, & C Richard Paul Prentice Hall ISBN 0-13-876889-7 It's written for people who know C pretty well, but don't know a thing about SPARC architecture. It has a pretty good reference section, and has exercises at the end of each chapter (if you're into that sort of thing). -Mike