M. G. Leonard

Beetle Queen

M. G. Leonard

The Highland Falcon Thief

M. G. Leonard, Sam Sedgman, et al.

Murder on the Safari Star

M. G. Leonard, Sam Sedgman, et al.

Beetle Boy

M. G. Leonard

Kidnap on the California Comet

M. G. Leonard, Sam Sedgman, et al.

Twitch

M. G. Leonard

Danger at Dead Man's Pass

M. G. Leonard, Sam Sedgman, et al.

Sabotage on the Solar Express

Sam Sedgman i M. G. Leonard