Huckleberry Finn is Tom Sawyer's best friend and constant companion throughout the novel.

The Hispaniola is the name of the pirate ship that Jim Hawkins and his companions sail on in their quest for treasure.

Buck is the name of the dog who is the protagonist of "The Call of the Wild" and undergoes a transformation from a domesticated pet to a wild animal.

Mowgli is the name of the boy who is raised by wolves in "The Jungle Book" and learns the ways of the jungle.

The Five Castaways are the group of castaways who are stranded on a remote island in "The Mysterious Island" and must use their ingenuity to survive.

Jim is the runaway slave who accompanies Huckleberry on his journey down the Mississippi River in "The Adventures of Huckleberry Finn".

The Nautilus is the name of the submarine that Captain Nemo commands in "Twenty Thousand Leagues Under the Sea".

Phileas Fogg is the protagonist of "Around the World in Eighty Days" who attempts to circumnavigate the globe in eighty days.

The Land of the Lost is the name of the plateau in South America where dinosaurs are discovered in "The Lost World".

The Swiss Family Robinson is the name of the family who is shipwrecked on a remote island in "The Swiss Family Robinson".

The Time Traveler is the name of the protagonist of "The Time Machine" who journeys to the future and witnesses the decline of humanity.

Griffin is the name of the scientist who develops a formula that makes him invisible in "The Invisible Man".

The Martians are the name of the alien race that invades Earth in "The War of the Worlds".

Dr. Moreau is the name of the scientist who creates human-animal hybrids in "The Island of Dr. Moreau".

The Congo River is the name of the river that Marlow travels on in his journey into the Congo in "Heart of Darkness".