The Little Liar is a novel by bestselling author Mitch Albom, published in hardcover by HarperCollins in November 2023. The book is 288 pages and carries ISBN 978-0-06-240665-1.

Set during World War II and the Holocaust, the story follows Nico Krispis, an eleven-year-old Jewish boy in Salonika, Greece, who is known for never telling a lie. When the Nazis occupy his city, a German officer exploits Nico's reputation for honesty, using the boy to reassure fellow Jewish residents to board trains bound "north" with promises of safety and work. Unknowingly complicit, Nico watches the final train take his own family toward Auschwitz. Shattered by what his truthfulness helped enable, he abandons honesty forever.

The novel traces Nico, his childhood love Mia, and the Nazi soldier Sebastian across decades, exploring how a single lie — and a life built on deception — can define and destroy everyone it touches. Narrated by Truth itself as a character, The Little Liar is a powerful meditation on innocence, guilt, and survival.