No duplicates. Some of the books look like they were never read. Important: No names, writing, or marks in any of these books; however, Gettysburg has some cover damage and Mt. St. Helens has writing on intro page (see picture). Books included as follows: The Great Chicago Fire, 1871 The California Wildfires, 2018 The Joplin Tornado, 2011 The Nazi Invasion, 1944 The American Revolution, 1776 The Shark Attack, 1916 The Eruption of Mt. St. Helens, 1980 The Children's Blizzard, 1888 The Battle at Gettysburg, 1863 The Japan Tsunami, 2011 The Galveston Hurricane, 1900 These books would make an excellent addition to your I Survived book collection.