Book recommendations on Karezza for couples like us

Does anyone have a recommendation for a book on Karazza or coitus reservatus that targets chaste men and women who enjoy full orgasms? I’ve spotted some titles online, but they usually discuss both partners holding back. That’s not the goal my wife is looking for. Actually, it looks like most of us here follow the pattern where only the husbands are restricted while their wives aren’t. So, does anyone know a good book that fits this description?