The First Agreement: Be Impeccable with Your Word – In this chapter, Don Miguel explains the power of the words we say to each other. This Four Agreements Summary will provide you with everything you need to know about the book and what quick teachings you will take from each chapter. The Four Agreements is based on ancient Toltec Wisdom and is a great self-improvement and awareness book. The book has sold over 7.2 million copies. The Four Agreements was published in 1997 and remained a best seller in the New York Times for eight years.