"The Hundred-Year-Old Man Who Climbed Out the Window and Disappeared" is a novel by Swedish author Jonas Jonasson. It follows the story of Allan Karlsson, a centenarian who escapes from his nursing home on his 100th birthday. His adventure leads him to a suitcase filled with money, a group of criminals, and a series of unexpected encounters. As Allan reflects on his past, the narrative intertwines his life story with significant historical events, including his interactions with notable figures like Harry Truman and Mahatma Gandhi. The book combines humor and absurdity, exploring themes of aging, freedom, and the unpredictability of life.