The Vanishing Submarines
Reading edition
By ENSIGN ROBERT L. DRAKE
AUTHOR OF The Boy Allies in the Baltic, The Boy Allies on the North Sea Patrol, The Boy Allies Under Two Flags, The Boy Allies with the Flying Squadron, The Boy Allies with the Terror of the Seas

1916
CONTENTS
CHAPTER I. A MYSTERY
CHAPTER II. ON ACTIVE SERVICE AGAIN
CHAPTER III. A LESSON
CHAPTER IV. STRANGE WARFARE
CHAPTER V. THE END OF BLOSBERG
CHAPTER VI. WITH THE MOTORBOAT FLEET
CHAPTER VII. AN ENEMY
CHAPTER VIII. FRANK IN TROUBLE
CHAPTER IX. JACK TO THE RESCUE
CHAPTER X. LOST—THE STORM
CHAPTER XI. ON THE HUNT
CHAPTER XII. THE FIRST VICTIM
CHAPTER XIII. A DESPERATE VENTURE
CHAPTER XIV. WITH THE ENEMY
CHAPTER XV. PLOTTING
CHAPTER XVI. AN ENEMY SUNK
CHAPTER XVII. AN ARGUMENT SETTLED—TEMPORARILY
CHAPTER XVIII. MISTAKEN FOR AN ENEMY
CHAPTER XIX. THE TRAP IS SET
CHAPTER XX. THE TRAP IS SPRUNG
CHAPTER XXI. AT SEA AGAIN
CHAPTER XXII. TOWARD OSTEND AGAIN
CHAPTER XXIII. AN UNEXPECTED ENCOUNTER
CHAPTER XXIV. ANOTHER UNPLEASANT SURPRISE
CHAPTER XXV. DOOMED TO DIE
CHAPTER XXVI. MORE TROUBLE
CHAPTER XXVII. THE PIRATES REAPPEAR
CHAPTER XXVIII. THE BATTLE AND THE ATTACK ON THE U-6
CHAPTER XXIX. THE END OF A TRAITOR