This very good book covers most of the topics that the typical person (or family) needs to consider while making the major decision of when to claim Social Security retirement benefits.
The book is organized into bite-sized pieces that lets you easily focus on your specific situation (Single, working spouse, spouses with unequal earnings histories, non-working spouse, etc.). It explains the rational behind the decision making for the 'when to file' decisions.
This book has helped me tweak my strategy for when to claim and has made me much more confident about my decision. Well worth the price!