83 Afloat in a Sunken Forest; or, Frank Reade, Jr.’s Submarine Cruise.
84 The Abandoned Country; or, Frank Reade, Jr., Exploring a New Continent.
85 Over the Orient; or, Frank Reade, Jr.’s Travels in Turkey.
86 The Corral Labyrinth; or, Frank Reade, Jr., Lost in a Deep Sea Cave.
87 Through the Tropics; or, Frank Reade, Jr.’s Adventures in the Gran Chaco.
88 The White Desert; or, Frank Reade, Jr.’s Trip to the Land of Tombs.
89 1000 Fathoms Deep; or, With Frank Reade, Jr. in the Sea of Gold.
90 In the Black Zone; or, Frank Reade, Jr.’s Quest for the Mountain of Ivory.
91 The Missing Planet; or, Frank Reade, Jr.’s Hunt for a Fallen Star.
92 The Sunken Isthmus; or, Frank Reade, Jr. in the Yucatan Channel.