Tom Swift and His Airline Express by Victor Appleton

After the treatment that had been accorded him, Tom Swift rather welcomed than otherwise a chance to come to grips with the men who were responsible for his position. Usually even-tempered and generous, just now he felt eager for vengeance and he would not have cared much if two men had attacked him at once.

Strangely enough he did not feel weak or ill now. He had, somewhat, when he first regained his senses after having been overpowered by some drug. But his brain had cleared and he kept himself in such good physical trim all the while that even a night of unconsciousness had not sapped his strength.