At twelve Betty is left an orphan. 2. BETTY GORDON IN WASHINGTON, _or Strange Adventures in a Great City_ Betty goes to the National Capitol to find her uncle and has several unusual adventures. 3. BETTY GORDON IN THE LAND OF OIL, _or The Farm That Was Worth a Fortune_ From Washington the scene is shifted to the great oil fields of our country. A splendid picture of the oil field operations of today. 4. BETTY GORDON AT BOARDING SCHOOL, _or The Treasure of Indian Chasm_ Seeking treasures of Indian Chasm makes interesting reading. 5. BETTY GORDON AT MOUNTAIN CAMP, _or The Mystery of Ida Bellethorne_ At Mountain Camp Betty found herself in the midst of a mystery involving a girl whom she had previously met in Washington. 6. BETTY GORDON AT OCEAN PARK, _or School Chums on the Boardwalk_ A glorious outing that Betty and her chums never forgot. 7. BETTY GORDON AND HER SCHOOL CHUMS, _or Bringing the Rebels to Terms_ Rebellious students, disliked teachers and mysterious robberies make a fascinating story. 8. BETTY GORDON AT RAINBOW RANCH, _or Cowboy Joe’s Secret_ Betty and her chums have a grand time in the saddle. 9. BETTY GORDON IN MEXICAN WILDS, _or The Secret of the Mountains_ Betty receives a fake telegram and finds both Bob and herself held for ransom in a mountain cave. _Send For Our Free Illustrated Catalogue_ THE RADIO GIRLS SERIES BY MARGARET PENROSE _12mo. Cloth. Illustrated. Jacket in full colors_ _Price per volume, 65 cents, postpaid_ A new and up-to-date series taking in the activities of several bright girls who become interested in radio. The stories tell of thrilling exploits, out-door life and the great part the Radio plays in the adventures of the girls and in solving their mysteries. Fascinating books that girls of all ages will want to read. 1. THE RADIO GIRLS OF ROSELAWN, _or A Strange Message from the Air_ Showing how Jessie Norwood and her chums became interested in radiophoning, how they gave a concert for a worthy local charity, and how they received a sudden and unexpected call for help out of the air. A girl wanted as witness in a celebrated law case disappears, and the radio girls go to the rescue. 2. THE RADIO GIRLS ON THE PROGRAM, _or Singing and Reciting at the Sending Station_ When listening in on a thrilling recitation or a superb concert number who of us has not longed to “look behind the scenes” to see how it was done? The girls had made the acquaintance of a sending station manager and in this volume are permitted to get on the program, much to their delight. A tale full of action and fun. 3. THE RADIO GIRLS ON STATION ISLAND, _or The Wireless from the Steam Yacht_