One of the best books I have ever found the time to read - do NOT pass this one up. I would classify this one as "edutainment" because of the amazing way Bryson finds to add a constant stream of witty observations and humor to the most amazing story ever - the story of everything. For example, he explains how cosmic radiation forms part of the noise and static on a TV, and says that next time your kids are bored, "just turn to a channel you don't get and listen to a piece of the formation of the universe."