First of the Bulldog Drummond novels.

Bored former army officer, Capt. Hugh Drummond, “late of the Royal Loamshires”, puts an ad­ver­tise­ment in the paper looking for adventure. He gets more than he expected when a young woman puts him on the trail of a master criminal who is organizing a would-be socialist putsch.

En­ter­tain­ing in a square-jawed, stiff-upper-lip sort of way.