Still wondering whether The Four Gifts of Anxiety is worth a read? Here is a recent endorsement from psychcentral.com, April 2015.
"Using strength-based approaches to wellness, Boyle includes useful exercises designed to spark personal reflection and growth and to help cope with anxiety in concrete ways. Too many books on the market that promise relief from anxiety fail to deliver. They spend far too much time on what anxiety is, rather than on what to do about it. Boyle takes the opposite approach. She does walk through some of the clinical issues, but devotes much of her writing to effective coping strategies."