- 1Chapter I — Untold Millions
- 2Chapter II — A Strange Offer
- 3Chapter III — Thinking It Over
- 4Chapter IV — Against His Will
- 5Chapter V — Busy Days
- 6Chapter VI — Mary’s Odd Story
- 7Chapter VII — The Trial Trip
- 8Chapter VIII — The Mud Bank
- 9Chapter IX — Ready to Start
- 10Chapter X — Startling Revelations
- 11Chapter XI — Barton Keith’s Story
- 12Chapter XII — In Deep Waters
- 13Chapter XIII — The Sea Monster
- 14Chapter XIV — In Strange Peril
- 15Chapter XV — Tom to the Rescue
- 16Chapter XVI — Gasping for Air
- 17Chapter XVII — Where Is It?
- 18Chapter XVIII — A Separation
- 19Chapter XIX — The Serpent Weed
- 20Chapter XX — The Devil Fish
- 21Chapter XXI — A War Reminder
- 22Chapter XXII — Studying Currents
- 23Chapter XXIII — An Undersea Collision
- 24Chapter XXIV — The Treasure-Ship
- 25Chapter XXV — The Steel Box
Tom Swift and His Undersea Search
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