I couldn't say on the Barker's book as I only flipped through it. And yes, the McCurley book is nearly half pictures (goooorgeous pictures) of ball python morphs, but also has excellent husbandry information and common health issues, etc.

But I'm glad I both the de Vosjoli and the McCurley book (and eventually the Barker book) because I can compare and contrast information and oh yeah, amazing pictures of snakes and neat information. =)