Second entry in series of teen aviation stories, filled with lots of scientific jargon, a jewel heist, and adventure. Van Powell is a pseudonym of early Hollywood screenwriter, Ardon Van Buren Powell (1886-1958). ( Matt Pierard)
Chapters
1 I ''Suspicious Sandy'' 10 min 2 II Ghosts, Gum, and Gems 10 min 3 III The Sky Patrol Organizes 12 min 4 IV Mystery Over the Ocean 16 min 5 V Mystery in the Fog 10 min 6 VI The End of the Chase 5 min 7 VII The Swamp Gives Up a Clue 12 min 8 VIII Sandy Meets a ''Suspect'' 12 min 9 IX Jeff Encounters a ''Jinx'' 12 min 10 X Larry's Capture 16 min 11 XI ''Pop! Goes Our Mystery!'' 10 min 12 XII The Hoodooed Airplane 13 min 13 XIII The ''Hoodoo'' Strikes 12 min 14 XIV Dick Handles a Control Job 12 min 15 XV A Trap is Baited 10 min 16 XVI The ''Bait'' Vanishes 8 min 17 XVII A Fight for a Fortune 12 min 18 XVIII Outwitted! 6 min 19 XIX A Baffling Discovery 10 min 20 XX Sandy Turns Over a New Leaf 10 min 21 XXI The Sky Patrol Gives Up 8 min 22 XXII The ''Ground Crew'' Takes Hold 10 min 23 XXIII Larry ''Solos'' 8 min 24 XXIV A Puzzling Development 10 min 25 XXV High Wings! 10 min 26 XXVI The Race 10 min 27 XXVII Sandy's Discovery 10 min 28 XXVIII Night in the Hangar 14 min 29 XXIX Sandy's Trail 8 min 30 XXX Dick Encounters the ''Ghost'' 6 min 31 XXXI A Triumph for the Enemy 6 min 32 XXXII A Double Pursuit 11 min 33 XXXIII A Battle Above the Clouds 9 min 34 XXXIV The Emeralds Are Found 9 min
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