An excellent review, here is the closing bit:
Labeling it a “love letter,” would render Cowen promiscuous (or is it adulterous?) since the letter is addressed to so many businesses. Seen as a fan letter, the book works much better. Cowen, a huge NBA fan, realizes that his hardwood heroes are supposed to be great at basketball. It’s OK to admire them from afar and not an affront if they cannot be your actual friends, as long as they can drain three-pointers. Likewise, with his business anti-heroes.
Do read the whole thing.