This book provides a series of prayers and invocations dedicated to the devotion of the Devil and its facets such as Sophia or other forms, it is the result of a clear influence of eastern esoteric practices, more specifically Hindu such as Bhakti Yoga. The author says that the ritualistic elements found here do not belong to a specific path and that therefore any practitioner of the left-hand path can apply it to their practice, although like many of these books it is noted that what is captured is a part of his personal vision and it is very difficult to apply these elements in our personal practice without modifying verses. It is an excellent book, the quality is supreme, made with good material and limited copies, the verses are really beautiful and some exude power, it is very inspiring, but we cannot forget that it is the work and personal vision of an author.