3 Books for addressing Social Anxiety

1. "Diagonally-Parked in a Parallel Universe" by Signe A. Dayhoff

"Diagonally-Parked in a Parallel Universe: Working Through Social Anxiety" is considered an exemplary  guide to address social anxiety disorder as it is authored by both a specialist in the field and a person who has personally battled with the condition.
Dr. Signe Dayhoff presents an outline  of the previous research on the topic. More importantly, practical exercises, for managing anxiety in a diverse set of social activities, are also included.

2. "Dying of Embarrassment" by Barbara G. Markway, et al. 

"Dying of Embarrassment: Help for Social Anxiety & Phobia"  includes workbook-style exercises and practical examples allowing the reader to actually put the principles into practice.

3. "Beyond Shyness" by Jonathan Berent

In "Beyond Shyness: How to Conquer Social Anxiety," Berent explains practical strategies and goal-setting exercises for addressing social anxiety.