The Problem Professor

A Roaring Twenties closed-room train mystery and another whodunit for Doro Banyon.

After spending the summer with her parents in Colorado, Doro, college librarian and amateur sleuth, plans to enjoy a luxurious respite in posh surroundings on the train trip home. Traveling with her best friend and her grandmother adds to her enthusiasm until an accident occurs, and part of the train must be left behind. Hours later, a passenger who has crossed swords with several others on board is found dead...