The book that Professor Tshiji offers us is a small ABC of the couple. And who, better than a husband (that is to say who knows the situation from the inside), is able to deliver secrets for the benefit of those who want to take advantage of it. This book is not only addressed to couples, but also to those who are preparing for a life in couple, to the animators of communities, to the ministers of God and even to the priests for the need of their accompaniment of couples.