The Hunger Games by Suzanne Collins is best for ages 12 and up, and many parents feel most comfortable at 13.

The best books on the Ming Dynasty include The Troubled Empire, 1587, A Year of No Significance, When China Ruled the Seas, The Confusions of Pleasure, Ming: 50 Years That Changed China and Romance of the Three Kingdoms.

The best books on the Celts include The Ancient Celts by Barry Cunliffe, The Celts: A Very Short Introduction, The Celts by Alice Roberts, The Táin, The Mabinogion and The Eagle of the Ninth.

The best books on Mesopotamia include The Epic of Gilgamesh, Babylon by Paul Kriwaczek, Ancient Iraq, History Begins at Sumer, Assyria by Eckart Frahm and Daily Life in Ancient Mesopotamia.

The best books on the Persian Empire include Persians: The Age of the Great Kings, From Cyrus to Alexander, The Persian Empire by Lindsay Allen, Ancient Persia by Matt Waters, The Histories and the Shahnameh.

The best books on the transatlantic slave trade include The Slave Ship, The Slave Trade by Hugh Thomas, Lose Your Mother, The Interesting Narrative of Olaudah Equiano, Barracoon and Homegoing.

The best books on the Haitian Revolution include Avengers of the New World, The Black Jacobins, Black Spartacus, Toussaint Louverture by Philippe Girard, Silencing the Past and The Kingdom of This World.

The best books on the Mexican Revolution include The Mexican Revolution by Alan Knight, Zapata and the Mexican Revolution, The Life and Times of Pancho Villa, Insurgent Mexico, The Underdogs and Like Water for Chocolate.

The best books on the Nuremberg Trials include The Nuremberg Trial by Ann and John Tusa, The Anatomy of the Nuremberg Trials, East West Street, Nuremberg Diary, The Nazi and the Psychiatrist and Justice at Nuremberg.

The best books on the Weimar Republic include Weimar Germany by Eric D. Weitz, The Coming of the Third Reich, Weimar Culture, Defying Hitler, When Money Dies and Goodbye to Berlin.