It Happened on a Train (Brixton Brothers, Bk. 3)

For a great detective, the best part of retiring is coming out of retirement.

Retired private detective and current seventh grader Steve Brixton has a new job: He takes out the trash for five bucks a week. But it's hard to leave the old game behind, and on a train trip down the California coast, Steve and his best chum, Dana, are pulled into a mystery involving a fleet of stolen automobiles, a vanishing girl, and a phantom train car. Oh, and there might just be some romance....
     This laugh-out-loud mystery is a witty, modern-day companion to the adventures of the Hardy Boys and Nancy Drew that brims with humor and intrigue.