Graham Hancock books in order
13 books in the catalogue, about 120 hours of reading in all; the shortest takes 4 hours and the longest 14 hours.
13 standalone books in the catalogue.
Standalone books
Lords of Poverty 4.3 h 
The Sign and the Seal 11.0 h 
Fingerprints of the Gods (2 editions) 10.9 h 
The Message of the Sphinx 6.8 h 
The Mars Mystery 6.5 h 
Heaven's Mirror 6.2 h 
Underworld 14.1 h 
Talisman 10.3 h 
Supernatural 13.1 h Disinformation Guide to Ancient Aliens, Lost Civilizations, Astonishing Archaeology and Hidden History 6.3 h 
Magicians of the Gods 10.3 h 
America Before 11.2 h 
Immortality Key 8.8 h