29 books • 3 series
The Seventh Secret (Order of the Black Sun, #11)
The Vault of Hercules (Order of the Black Sun, #16)
The Genesis Project (The Artemis Team, #2)
Louisiana Blues (The Louisiana Files, #3)
The Alcazar Code (The Artemis Team, #3)
Tomb of Odin (Order of the Black Sun, #9)
Bones in the Bayou (The Louisiana Files, #1)
Mystery of the Swamp (The Louisiana Files, #2)
Mystery of the Amber Room (Order of the Black Sun, #13)
The Tesla Experiment (Order of the Black Sun, #10)
The Babylonian Mask (Order of the Black Sun, #14)
The Fountain of Youth (Order of the Black Sun, #15)
Hunt for the Lost Treasure (Order of the Black Sun, #17)
Operation Hydra (The Artemis Team, #1)
King Solomon's Diamonds
The Library of Forbidden Books (Order of the Black Sun, #8)
Operation Nexus Eins
The Atlantis Scrolls (Order of the Black Sun, #7)
Die Schwarze Sonne Verschworung
The Black Sun Conspiracy
Seven Cities of Gold
Operation Nexus One
Nazi Gold
The Hunt for the Holy Grail