20 books • 6 series
Charon's Quest (The Underworld Saga, #10)
The Mystery Man
Hunting Prometheus (A Gatekeeper's Spin-Off, #2)
The Mystery House 2
Hypnos (A Gatekeeper's Saga Spin-Off, #1)
The Gatekeeper's Bride (Gatekeeper's Saga, #0)
The Mystery House
Vampire Ascension (Vampires of Athens, #3)
Vampire Affliction (Vampires of Athens, #2)
The Calibans (Purgatorium, #3)
Vampire Addiction (Vampires of Athens, #1)
The Gatekeeper's Promise (Gatekeeper's Saga, #6)
Gray's Domain (Purgatorium, #2)
The Gatekeeper's Secret (Gatekeeper's Saga, #5)
The Mystery Tomb
The Purgatorium (Purgatorium, #1)
The Gatekeeper's House (#4) (Gatekeeper's Saga, #4)
The Gatekeeper's Challenge
The Gatekeeper's Sons
The Mystery Box
