Pure entertainment- and good. Combines two important elements,- the friendship between a boy and his horse, and involvement in the unraveling of a mystery in which Jim's contribution is the normal outgrowth of boyish curiosity. Jim Meadows had an out-of-school hours job which, on the particular morning in question, took him off on a longish trek on his horse, Ticktock. From the moment when Jim finds a box that has fallen from a hi-jackers' truck until the last when the affair is cleared up, Jim, his new friend, Larry, and Ticktock are made deputy sheriffs, the story moves at a fast clip. Jim is an honest, average boy. The mystery, though unlikely in our mid-west, is credible enough as it develops. It is the type of adventure with which boys can identify themselves. A lively and spirited story, sequel to Ticktock and Jim (1948) but not too dependent on it.