Sixteen Ways to Defend a Walled City
K. J. Parker
Fallen Angels
Michael Flynn & Larry Niven & Jerry Pournelle
Nightmare in Angel City
Franklin W. Dixon
Hardy Boys Casefiles (19)
Magelord: Worldwalker Book I
Andrew Christian
The Worldwalker Saga (1)
Far Horizons
Anne McCaffrey
Galactic Center Saga (5.5)