Most of the cache of books are pulled from publication
but this is a handy list of the CURRENT and most popularly read ones:

THE MOST UP-TO-DATE BOOKS ON THE SECRETS:
‘Philosophers’ Stone Rebus on the Z Ion’
Philosophers' Stone's Rebus on the Z Ion
‘Rebus in the Rosslyn Chapel’
Rebus in the Rosslyn Chapel
‘Enigmatic Voynich Manuscript’
Enigmatic Voynich Manuscript'
‘Enigmatic Dresden Codex’
Enigmatic Dresden Codex
‘Dresden Codex’
‘Enigmatic Odyssey’
‘Enigmatic Divine Comedy’
Enigmatic Divine Comedy
‘Enigmatic Paradise Lost’
Enigmatic Paradise Lost
‘Enigmatic Daniel’
[https://www.amazon.com/dp/B00TAHX632]
‘Enigmatic David’
[https://www.amazon.com/dp/B00TSLJXSW]
‘Rebus of the Number ‘31’ in the Dresden Codex’
Rebus of the Number '31' in the Dresden Codex
‘Rebus of the Number ‘31’ in the Voynich Manuscript’
Rebus of the Number '31' in the Voynich Manuscript
‘Enigmatic Paul’
‘Enigmatic Philosophers’ Stone’
https://www.amazon.com/dp/B00QUDRKPE
‘Enigmatic Number ‘26’
Enigmatic Number '26': Da Vinci's REAL Hidden Secrets
‘Enigmatic Voynich Wormholes’
‘Unicorns and Snake Gods’
‘The Use of Rebus in the Philosophers’ Stone’s Genre’
The Use of Rebus in the Philosophers' Stone Genre: Symposium Booklet for January 23, 2016

MYSTERY NOVELS (ALSO AVAILABLE IN PAPERBACK):
‘The Little Book’
[https://www.amazon.com/dp/B01BXIFC6O]
‘Stone of Fire’
‘Kingdom of the Stone’ (a sequel)

EVERYONE’S FAVORITE: ‘Voynich Manuscript’
Voynich Manuscript
L. A. Braun