Books by David Kristoph

The House on Hollow Hill (Ultimate Ending #2)
David Kristoph

Mystery in the Murky Deep (Ultimate Ending Book 10)
David Kristoph

The Strange Physics of the Heidelberg Laboratory (Ultimate Ending Book 6)
David Kristoph

Enigma at the Greensboro Zoo (Ultimate Ending Book 4)
David Kristoph

The House on Hollow Hill (Ultimate Ending Book 2)
David Kristoph

Sabotage in the Sundered Sky
David Kristoph

Siege of Praetar
David Kristoph

Bathed in Light (Tales of a Dying Star, #6)
David Kristoph

Mystery in the Murky Deep
David Kristoph

Sabotage in the Sundered Sky (Ultimate Ending Book 8)
David Kristoph