The Gutenberg-links for the books in this article from the site that I absolutely loath because it messed with copy and paste.

Children's books:

• The Tale of Peter Rabbit by Beatrix Potter
• Peter Pan and Wendy by J.M. Barrie
• Aesop’s Fables by Aesop
• The Wonderful Wizard of Oz by L. Frank Baum
• The Secret Garden by Frances Hodgson Burnett
• Grimm’s Fairy Tales by Jacob Grimm and Wilhelm Grimm
• Gulliver’s Travels by Jonathan Swift
• Rikki-Tikki-Tavi by Rudyard Kipling
• The Wind in the Willows by Kenneth Grahame
• Alice’s Adventures in Wonderland by Lewis Carroll

Science Fiction books:

• The War of the Worlds by H.G. Wells
• The Legend of King Arthur and his Knights by Sir James Knowles
• Deathworld by Harry Harrison
• Twenty Thousand Leagues Under the Sea by Jules Verne
• A Princess of Mars by Edgar Rice Burroughs
• The Scarlet Plague by Jack London
• Flatland by Edwin Abbott Abbott
• Auraria: A Novel by Tim Westover (Not on Gutenberg)
• The Cosmic Computer by H. Beam Piper
• The Crystal Crypt by Phillip K. Dick

Historical & Historical fiction books:

• The Journals of Lewis and Clark, 1804-1806 by Meriwether Lewis and William Clark
• Autobiography of Benjamin Franklin by Benjamin Franklin
• Theodore Roosevelt, An Autobiography by Theodore Roosevelt
• The Life of Hon. William F. Cody, Known as Buffalo Bill, the Famous Hunter, Scout and Guide: An Autobiography by William Frederick Cody
• Two Years Before the Mast by Richard Henry Dana
• Les Misérables by Victor Hugo
• Life on the Mississippi by Mark Twain
• South: The Story of Shackleton’s 1914-1917 Expedition by Sir Ernest Henry Shackleton