4. BOB DEXTER AND THE AEROPLANE MYSTERY
or The Secret of the Jint San
Bob and his chums witness the mysterious disappearance of an aeroplane and find excitement in their exploration of an unknown cave. The adventures which result are packed with thrills.
5. BOB DEXTER AND THE SEAPLANE MYSTERY
or The Secret of the White Stones
Bob Dexter, while on a vacation, captures a band of criminals, and solves a mystery in which millions of dollars in gems and jewelry had been stolen.
6. BOB DEXTER AND THE RED AUTO MYSTERY
or The Secret of the Flying Car
A story of a mysterious red auto is packed with many hair-raising adventures. Bob comes to the rescue and captures the criminals.
These books may be purchased wherever books are sold