In all fairness, I think personally (sorry to tread on Mark's toes, I am sure he'll give me 'what for' if he fancies it) that the book's aim may be a tad over your son's head.
However, that's an unfair statement by myself, as I have no idea as of what level of magic your son is at. But the book really does assume that you NEED to work with the Svengali deck, rather than 'give it a go'.
Saying that, the Sven deck is a great utility for younger magicians as it has an almost instant result, and this is appealing. Mark's book explores the deck in ways which you would not have thought obvious, and that is it's strength.
However, why don't YOU get the book for yourself and then be the judge? Not a single soul I know who owns this piece of work would find it to be anything but useful, informative, and worthy of a place on your shelves.
However, of course, I'm biased
