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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
Young Jack Harkaway in the wilds of Siberia
The boy in red, or, The czar's masked messenger
Jack Harkaway and the spy
Jack Harkaway trapped
Nick Carter and the nihilists, or, The mine under the grand duke's palace
An international conspiracy, or, Nick Carter's second assistant in a new field
Plotters against a nation, or, The mystery of the perfumed handkerchief
Mignon Duprez, the female spy, or, Patsy's fight for Adelina
A beautiful anarchist, or, Nick Carter's bravest act
The nihilist's second move, or, Nick Carter's timely interference
The brotherhood of Free Russia, or, Nick Carter's beautiful friend Olga
The boy messenger of Russia, or, The Czar's secret despatch bearer / by Allan Arnold
The sons of the sword, or, The watchers from the Rhine / by Richard R. Montgomery
The little demon, or, Plotting against the czar