The ninth book of the Aṅguttara Nikāya, the Collection of the Numbered Discourses of the Buddha, collects 432 suttas or discourses whose theme is centered on groups of nine topics. However, on this occasion the nine objects are not as explicit as in previous volumes. This book fundamentally revolves around the nine spheres or dimensions: the four jhānas, the four ayatanas, and the state of cessation, through a multiplicity of variations of varying complexity that reaches its climax in AN 9.41. With the head of the family Tapussa, a dense, complex and especially difficult to reconstruct speech that describes in depth the direct mystical path to complete enlightenment. The most interesting suttas, in addition to the previous one are: AN 9.5. Powers: The best way to care is to encourage, settle and ground the faithless in faith, the unethical in ethics, the miserly in generosity and the ignorant in wisdom. AN 9.19. A Deity: "Practice the jhānas, bhikkhus! Do not be negligent! Do not repent later, like those ancient devas." AN 9.22. A Wild Pony. Another sutta that uses the taming of horses, so akin to the Buddha. AN 9.33. The nine progressive contemplative achievements: It is a description of contemplative practice. AN 9.37. By Ānanda: How not to experience the sensory field. AN 9.71. Emotional sterility: On the consequences of doubts about the Master. This book does not contain false suttas. In summary, this time the arduous and exhaustive work of research and reconstruction in comparative linguistics has been especially difficult and the result is priceless for those of you who want to embark on the direct path to Nibbāna.