these two books are recommended by someone who dealt with their social anxiety well. haven't read them myself... yet.
wish i'd read them twenty years ago and acted on this stuff then. (his website: http://www.sawest.org )
Overcoming Social Anxiety and Shyness: A self-help guide using cognitive behavioural
techniques (2009) by Gillian Butler. ISBN: 1849010005. Also comes as a three part
course/workbook set (2007). ISBN: 1845295714, 1845295722, 1845295730.
The Shyness and Social Anxiety Workbook: Proven, step-by-step techniques for
overcoming your fear (2008) by Martin M. Antony and Richard P. Swinson. ISBN: