For my money, the best cold water in the face, take the red pill, lawyerly argued brief about how we are all screwed

is "
The Oil Age is Over" by Matt Savinar. Get it from his doomsday website
www.lifeaftertheoilcrash.net
Otherwise, best depends on how you define it:
Deffreys wrote perhaps the best petroleum geology books
Goldstein wrote the best energy science book
Ruppert wrote the best oil geopolitics conspiracy book
Heinberg wrote the most thoughtful take on future options for society
Kunstler wrote the best rant on and obituary for suburbia
Simmons has a book coming out which is supposed to be the best on the Saudis, but my copy hasn't come yet.
"The world is changed... I feel it in the water... I feel it in the earth... I smell it in the air... Much that once was, is lost..." - Galadriel