This interesting work, "The Dayspring of Youth" was penned by someone (or a group of folks) calling themselves “M” and has a subtitle regarding “Harnessing Nature's Highest Energy.” It’s very much a mixture of Yogic, Gnostic, and Hermetic teachings and is worth your time. Detailing some of the subtler forces related to the human organism, and how to relate oneself in harmony with them.
No book is perfect, and this one certainly is not, but since we’re extra focusing on practical spirituality this year, this books explanations of what goes into conscious eating, drinking, and breathing are very relevant and in depth.
Written - https://www.mediafire.com/file/2zy3h6mkiwxgekh/TheDayspringOfYouth_ByM.pdf
Audiobook - https://www.mediafire.com/file/h8s9453x5pms4hs/Audiobook_TheDaySpringOfYouth.mp3