(1 - 20 of 64)
Texan spy, or, The prairie guide
Nadia, the Russian spy
Eph, the mimic spy, or, The Frenchman's doom
Twenty boy spies, or, The secret band of Dismal Hollow
The brand of Siberia, or, The boy tracker of the Steppes
The blue mask, or, Fighting against the Czar
The iron grays, or, The boy riders of the Rapidan
The spy of Spuyten Duyvil, or, The boy with a charmed life