The collaboration of the son and the father gives a very well done book. It begins with a reminder of the first 4 agreements but explained differently, which gives new light. Although, as indicated, read the book if known 4 agreements with each reading is a discovery. It is the same for all the works of Don Miguel Ruiz. A new agreement to integrate therefore, presented in a clear and sensible, accessible to all. It seems obvious. Yet every word is important, it is also to be read several times to soak up this wisdom. And read quietly, it is clear that this 5th agreement frees us still more, for a harmonious life, which can be re-appropriate our true nature, purpose of these agreements. A book store near you, read and reread. The tone is never prescriptive. It is simple, at least to read, to apply, it must be vigilant, to do his best. But this is the fourth agreement.