Innumeracy by John Allen Paulos is a very interesting book. I heard it first from Prof. Bakshi.
From his website, INNUMERACY is an examination of some of the consequences in everyday life of mathematical illiteracy.
The book is a collection of anecdotes, examples, real life case studies on innumeracy. It talks how people fool themselves by coming up with incorrect judgements because of mathematical illiteracy.
Next on the list is Once upon a number, another book by John Allen Paulos and yet again recommended by Prof. Bakshi.
John Allen Paulos Official Website
Books by John Allen Paulos
Innumeracy on Amazon
P.S.: I am not doing justice by posting this much about the book. The book deserves lot more attention.