Victor Hugo in 1829 — cropped from lithograph by Achille Devéria in the collection of the National Gallery of Art
Photo Credit: By Achille Devéria - This file was donated to Wikimedia Commons as part of a project by the National Gallery of Art. Please see the Gallery's Open Access Policy., CC0, https://commons.wikimedia.org/w/index.php?curid=82067766

Drawing of the Hunchback of Notre Dame — showing the recently restored galerie des chimères
Photo Credit: By Luc-Olivier Merson (1846–1920) - , Public Domain, https://commons.wikimedia.org/w/index.php?curid=405505

Le Noir Faineant in the Hermit's Cell — "If a few spoilers will be forgiven: Le Noir Faineant is King Richard the Lionheart, and the Hermit is Friar Tuck"
by J. Cooper, Sr., after Sir Walter Scott's Ivanhoe
Photo Credit: By J. Cooper, Sr. Ivanhoe by Sir Walter Scott, Bart. Edinburgh: Adam & Charles Black, 1886. Volume IX of Waverley Novels: Centenary Edition, Public Domain, https://commons.wikimedia.org/w/index.php?curid=6837747

Don Quixote, Prado Museum — First editions of the first and second part
Photo Credit: By Miguelazo84 - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=55911465

Don Quixote de la Mancha — First edition (1605) cover
Photo Credit: By Miguel de Cervantes - Public Domain, https://commons.wikimedia.org/w/index.php?curid=89167492

Don Quixote de la Mancha and Sancho Panza — 1863, by Gustave Doré
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=337175

Portrait of Daniel Defoe — National Maritime Museum, London
Photo Credit: By Unknown, style of Sir Godfrey Kneller - Public Domain, https://commons.wikimedia.org/w/index.php?curid=12055365

Crusoe standing over Friday — After he frees him from the cannibals
Photo Credit: By Carl Offterdinger (1829-89) - Public Domain, https://commons.wikimedia.org/w/index.php?curid=117540

Cover The Light in the Forest — By http://pictures.abebooks.com/YRDSLBKS/299057778.jpg, Derived from a digital capture (photo/scan) of the book cover. Copyright held by the publisher or the artist. Claimed as fair use regardless.,
Photo Credit: Fair use, https://en.wikipedia.org/w/index.php?curid=10247768

Conrad Michael Richter —
Photo Credit: By Source, Fair use, https://en.wikipedia.org/w/index.php?curid=36707240

The Grapes of Wrath by John Steinbeck — First-edition (1939) dust jacket cover of
Photo Credit: By Jacket design by Elmer Hader. - Public Domain, https://commons.wikimedia.org/w/index.php?curid=91863504