The official SuperCollider Book is now available from MIT Press. Edited by Scott Wilson, David Cottle and Nick Collins, it includes contributions on all aspects of SuperCollider, from beginners’ tutorials through to advanced sound synthesis and composition techniques.

“This book documents the SuperCollider language to an extent never before achieved and shows how it can be used to realize a wide variety of musical and technical applications. The scholarship is sound, as the chapter authors are leaders in the field and deeply knowledgeable on how SuperCollider may be used, taught, and learned.”
—Robert Rowe, Director, Steinhardt Music Composition Program, New York University

Available from Amazon and other good bookshops.

More details at https://github.com/supercollider/scbookcode/