○ The Hosts of the Air
○ Publication History
1 The Trench
2 The Young Austrian
3 Julie’s Coming
4 The Hôtel at Chastel
5 The Register
6 John’s Resolve
7 The Pursuit
8 Into Germany
9 The Great Castle
10 The Fair Captive
11 The Efficient Hostler
12 The Hunting Lodge
13 The Dangerous Flight
14 The Happy Escape