It happened on a train (Brixton Brothers #3)
by Mac Barnett

Popularity 24
Seventh-grader Steve Brixton finds himself pulled back into sleuthing when, during a train trip down the California coast, he uncovers a mystery involving a fleet of priceless automobiles, an assassin, and a private rail car.
Robbers and outlawsHumorous storiesRailroad trainsFictionMystery and detective storiesThievesJuvenile fictionChildren's fictionRailroads, fictionRobbers and outlaws, fictionCalifornia, fictionRailroads