I think some of the previous reviewers missed the point a little bit.
Dream Boogie is an intelligent read that leaves no stone unturned in chronicling Sam Cooke's entire life and career. Every session, every tour, and every release is discussed, and if you're a fan of the man's music, as opposed to simply being attracted to the sensational elements of his life that have been beaten into the ground over the past 40+ years, you will enjoy this book immensely. Guralnick is clearly a student of Cooke's music, and provides context and details about that music that had never been revealed prior to the release of the book.
If you want to find out what Sam Cooke's innermost thoughts and feelings were, you are going to be disappointed, because as the book makes pains to reveal, Cooke had demons that he never fully revealed to even his closest friends or family. Everyone of interest that was ever associated with Cooke was interviewed in a thorough fashion by Guralnick (who, by the way, also interviewed Cooke himself prior to his death), and if none of them could crack Cooke's complex nature, you can hardly expect Guralnick to do so either.
My one minor quarrel with the book is that Guralnick, after going to tremendous lengths to introduce us to Cooke inner-circle figures like Bobby Womack, J.W. Alexander, and Allen Klein, doesn't quite tie up all the loose ends associated with these people that followed Cooke's demise. For instance, I thought Guralnick could have told us that Womack went on to achieve significant solo success, or that he divorced Cooke's ex-wife in 1970, that Alexander passed away in 1996, etc. But these are just tangential facts. The facts that most readers should want, aka the ones involving Sam Cooke, are all here.
Recommended.