After reading Clarkson's 'According to' series, I was expecting May's books to be of similar quality but with a different sort of humor. Sadly, although the type of humor IS different, every chapter reads quite..slow. Now I know he's called Captain Slow, but I'd still expect his book chapters to get to the point a bit more quickly, given that its a book collection of his columns and he doesn't have ample time to elaborate as much as on TV.
The book starts off great, providing a lot of chuckles with few technical descriptions and great punchlines. But as you keep reading, James gradually descends into a slow tirade of facts and figures in each chapter which takes away a bit from the actual humor.
I'd still recommend this for Top Gear fans and will give his other books a shot. But overall it just doesn't have that rib-tickling humor that Jeremy's books do.