- A Maker of HistoryAuthor: E. Phillips (Edward Phillips) OppenheimLanguage: English
- A Rogue by Compulsion: An Affair of the Secret ServiceAuthor: Victor BridgesLanguage: English
- Affair in ArabyAuthor: Talbot MundyLanguage: English
- Brain TwisterAuthor: Randall Garrett, Laurence M. JaniferLanguage: English
- Elusive IsabelAuthor: Jacques Futrelle, Alonzo KimballLanguage: English
- GreenmantleAuthor: John BuchanLanguage: English
- HavocAuthor: E. Phillips (Edward Phillips) OppenheimLanguage: English
- I SpyAuthor: Natalie Sumner LincolnLanguage: English
- KimAuthor: Rudyard KiplingLanguage: English
- Mr. StandfastAuthor: John BuchanLanguage: English
- Okewood of the Secret ServiceAuthor: Valentine WilliamsLanguage: English
- That Sweet Little Old LadyAuthor: Randall Garrett, Laurence M. Janifer, Kelly FreasLanguage: English
- The Arbiter: A NovelAuthor: Bell, Florence Eveleen Eleanore Olliffe, LadyLanguage: English
- The Boy Scout AviatorsAuthor: Durston, GeorgeLanguage: English
- The Czar's Spy: The Mystery of a Silent LoveAuthor: William Le QueuxLanguage: English
- The Dare Boys of 1776Author: Stephen Angus Douglas CoxLanguage: English
- The Double TraitorAuthor: E. Phillips (Edward Phillips) OppenheimLanguage: English
- The Girl and the Bill: An American Story of Mystery, Romance and AdventureAuthor: Merwin, BannisterLanguage: English
- The Great ImpersonationAuthor: E. Phillips (Edward Phillips) OppenheimLanguage: English
- The Kingdom of the BlindAuthor: E. Phillips (Edward Phillips) OppenheimLanguage: English
- The Lost Ambassador; Or, The Search For The Missing DeloraAuthor: E. Phillips (Edward Phillips) Oppenheim, Howard Chandler ChristyLanguage: English
- The Lost DespatchAuthor: Natalie Sumner LincolnLanguage: English
- The Man with the ClubfootAuthor: Valentine WilliamsLanguage: English
- The New Forest SpyAuthor: George Manville Fenn, Evans, W. D. E. [Illustrator]Language: English
- The Powers and MaxineAuthor: C. N. (Charles Norris) Williamson, A. M. (Alice Muriel) Williamson, Frank T. MerrillLanguage: English
- The Riddle of the SandsAuthor: Erskine ChildersLanguage: English
- The SpyAuthor: James Fenimore CooperLanguage: English
- The Thirty-Nine StepsAuthor: John BuchanLanguage: English
- The VulturesAuthor: Henry Seton MerrimanLanguage: English