I so badly wanted a book that told me everything I could possibly need for 3d collisions in 3d games. So if you're in the same position as me I say and say again and again : Do Not Buy This Book. It is a waste of time. It's of little use whatsoever in 3d games as it's written by the sounds of it for a 3rd year Maths Degree course (which is what I studied at uni). Theroem, proof, corollary. There are little if no practical examples and a lot of the really useful collisions you'd need (ie ray->cylinder) just aren't covered at all. For maths degree course only.