On 12–15 September 2015, one month before its release day, the Kindle edition of The Book of Secret Wisdom was a #1 best seller in all six categories assigned on Amazon.com:

#1 in Books > Religion & Spirituality > Occult & Paranormal > Ancient & Controversial Knowledge
#1 in Books > Religion & Spirituality > New Age & Spirituality > Theosophy
#1 in Kindle Store > Kindle eBooks > Religion & Spirituality > Occult > Unexplained Mysteries
#1 in Kindle Store > Kindle eBooks > Religion & Spirituality > New Age > Divination > Prophecy
#1 in Kindle Store > Kindle eBooks > Religion & Spirituality > New Age > Theosophy
#1 in Kindle Store > Kindle eBooks > Religion & Spirituality > Religious Studies & Reference > Controversial Knowledge