The Years of Lyndon Johnson is a series of biographical books written by Robert A. Caro. While not strictly alternative history, these books provide a deep dive into the life and political career of Lyndon B. Johnson, the 36th President of the United States. Caro's meticulous research and compelling storytelling shed light on the mysteries and complexities of Johnson's rise to power, making this series a must-read for history enthusiasts and those interested in political mysteries.