Books in Children's Book Series (sorted alphabetically)
- Tom Swift and His Sky Racer; Or, The Quickest Flight on Record Victor Appleton
- Tom Swift and His Submarine Boat; Or, Under the Ocean for Sunken Treasure Victor Appleton
- Tom Swift and His Undersea Search; Or, the Treasure on the Floor of the Atlantic Victor Appleton
- Tom Swift and His War Tank; Or, Doing His Bit for Uncle Sam Victor Appleton
- Tom Swift and His Wireless Message; Or, The Castaways of Earthquake Island Victor Appleton
- Tom Swift and His Wizard Camera; Or, Thrilling Adventures While Taking Moving Pictures Victor Appleton
- Tom Swift and the Visitor From Planet X II Victor Appleton
- Tom Swift in Captivity, Or, A Daring Escape By Airship Victor Appleton
- Tom Swift in the Caves of Ice, or, the Wreck of the Airship Victor Appleton
- Tom Swift in the City of Gold; Or, Marvelous Adventures Underground Victor Appleton
- Tom Swift in the Land of Wonders Victor Appleton
- Tom Swift in the Land of Wonders; Or, The Underground Search for the Idol of Gold Victor Appleton
- Torch Bearer: A Camp Fire Girls' Story I. T. Thurston
- Twin Cousins Sophie May
- Two Elsies Martha Finley
- Two Little Knights of Kentucky Annie F. Johnston
- Two Little Women on a Holiday Carolyn Wells
- Uncle Sam's Boys in the Philippines; or, Following the Flag against the Moros H. Irving Hancock
- Uncle Sam's Boys with Pershing's Troops H. Irving Hancock
- Uncle Wiggily and Old Mother Hubbard Howard Roger Garis
- Uncle Wiggily in the Woods Howard Roger Garis
- Uncle Wiggily's Adventures Howard Roger Garis
- Uncle Wiggily's Travels Howard Roger Garis
- Wonder Island Boys: Adventures on Strange Islands Roger T. Finlay
- Wonder Island Boys: Conquest of the Savages Roger T. Finlay