Read with a grain of salt. Michael Bamberger's prose seems fawning and worshipful of M. Night Shyamalan, a director whose reputation has sunk to a low reached by few others in Hollywood. This book seems less like a fair analysis of Shyamalan than a elaborate piece of marketing and PR hype. The book depicts him as a misunderstood genius who clashed with execs at Disney over his then-current project "Lady in the Water."
In my opinion, "Lady in the Water" was his first truly awful film, nonredeemable because of Shyamalan's terrible script and the ridiculous casting of himself as the savior of the world. The film was more the product of egocentric self-indulgence than artistic expression, least of all the simple desire to entertain others.
Do not succumb to the brainwashing tactics of this book. I believe Shyamalan has talent. He proved it with "The Sixth Sense." If only he had a little less arrogance.