I HIGHLY recommend that you read the book. I know you would just LOVE for your wife to read Sclessinger, but if you cannot incorporate the ideas of Dieda, then you are being simply hypocritical to expect your wife to take up Schlessinger.
Dieda says: 1. The man’s primary purpose is pursuit of his main objective, be that career, a hobby, the arts, whatever. 2. The woman is the inspiration for the man’s primary purpose. 3. The man’s responsibility is to share gifts with his woman that he achieves through pursuit of his primary purpose. 4. The woman’s primary purpose is the relationship.
All this is lockstep with what Schlessinger proposes, but from the male point of view. If Schlessinger is good for your wife, then Dieda HAS to be good for you. The problem I see you having with it is that you will have to take accountability for your role as the man and stop asking your wife to do that for you.