John Vornholt books in order
12 books in the catalogue, about 47 hours of reading in all; the shortest takes 2 hours and the longest 7 hours.
1 series and 9 standalone books in the catalogue.
The Genesis Wave
4 books
The Genesis Wave, Book One 5.7 h 
The Genesis Wave, Book Two 5.2 h The Genesis Wave, Book Three length not known
Genesis Force 6.7 h Standalone books
Star Trek The Next Generation - Starfleet Academy - Capture the Flag 2.2 h 
River Quest 2.7 h 
Star Trek The Next Generation - Starfleet Academy - Crossfire 1.9 h 
The Tale of the Ghost Riders 2.4 h 
Star Trek The Next Generation - The Dominion War - Behind Enemy Lines 5.3 h 
Star Trek The Next Generation - The Dominion War - Tunnel Through The Stars 4.9 h 
Haunts in the House 2.6 h 
Witchopoly 2.8 h 
Star Trek The Next Generation - A Time to Be Born 5.2 h