A secret letter. A Thanksgiving mystery. One very curious detective. When Renee discovers a mysterious unsigned note buried in her leaf pile, she and her faithful cat, Tiger, leap into action! Who could have written it—and why? With Thanksgiving just around the corner, clues begin piling up faster than autumn leaves. From suspicious siblings to secret smiles at the dinner table, every hint brings Renee closer to the truth… and to a heartwarming surprise she never expected. Perfect for fans of Junie B. Jones , Judy Moody , and A to Z Mysteries , The Case of the Unsigned Letter blends gentle humor, family warmth, and a dash of mystery that keeps young readers turning pages. Cozy, funny, and full of Thanksgiving spirit, this fifth book in The Tiger Chronicles celebrates kindness, curiosity, and gratitude—the perfect fall read for curious kids and family reading time!