The Forgotten Garden by Kate Morton is a mesmerizing cozy antique mystery book that spans generations. The story follows Cassandra, who inherits a cottage in Cornwall and discovers a hidden garden with a mysterious past. As she unravels the secrets of the garden, she uncovers a family history filled with love, betrayal, and tragedy. With its richly detailed settings and compelling characters, this book is perfect for those who enjoy atmospheric and heartwarming mysteries.