_This is a new line of stories for boys, by the author of the Boy Ranchers series. The Bob Dexter books are detective stories, yet they are without the objectionable features of the impossible characters and absurd situations that mark so many of the books in that class. These stories deal with the up-to-date adventures of a normal, healthy lad who has a great desire to solve mysteries, and the volumes relate in an entertaining way how he does it._