Book #4 -- Decisive by Chip and Dan Heath

Highly recommended for anyone who ever has or ever will make a decision.  The book helps to find blind spots in one's perspective, as well as looking forward to the effects of the decision when made.  I've already used it twice in my personal and professional life.  The book is extremely easy to read . . . it intersperses the psychology and economy theory with personal, business and education anecdotes.