Initiation Into Hermetics (By: Franz Bardon) This is both a theoretical and practical guide on spiritual development from a hermetic perspective. It is highly recommended by other communities for its effectiveness, as well as its clear language.
Entangled Minds (By: Dean Radin) This book discusses research done by the Institute of Noetic Sciences and universities such as Princeton about the existence of psychic phenomena. It entertains the idea that we are connected with all other objects and individuals. This is a light, more casual read.
Book 4 Part 1 (By: Aleister Crowley) Examines religion from a magical/psionic standpoint. This guide gives instructions on meditation practices that the beginner should consider including as a part of his/her practice regimen.
Psychic Self-Defense (By: Dion Fortune) Defend yourself against psychic attacks. I recommend this one cautiously due to how the information might be used by a beginner. The material itself is fantastic.
The Tree of Life: An Illustrated Study in Magic (By: Israel Regardie) This is Israel Regardie's magnum opus. A lot of western esotericism bases itself around the tree of life. If you're interested in delving into topics not directly related to the branch of psionics, you'd be doing yourself a huge favor to understand and study the tree of life.
The Secret Doctrine (By: H.P. Blavatsky) This book discusses the origin and evolution of humanity (from an occult perspective). This book is not to be read lightly. Its going to take you awhile and probably multiple reads to understan