24: The Unofficial Guide

Although this book doesn't have much to say about the making of 24 or what happens behind the scenes, it is a very good summary of the plot and events of the fantastic first season of 24. Each day is covered in detail, and the book raises good points and questions about the show. It asks reasonable things about possible plot holes without becoming too whiny, and it's clear that the writer actually enjoys the show himself. This book isn't essiential to a 24 fan, but it's definitely a good read.