Lisa Fiedler

Lisa Fiedler is an American author of middle-grade fiction known for the Mouseheart series, an animal-adventure fantasy set beneath New York City's subway system, beginning with Mouseheart (2014) and continuing through Hopper's Destiny and Return of the Forgotten, following a house mouse who becomes an unlikely leader among the city's rodent societies. She also wrote the Time Hunters series, blending time-travel adventure with historical settings, and the Ages of Oz series, an extension of the Oz universe for young readers. Fiedler's earlier work includes contemporary and mystery fiction for teens, such as Know-It-All. Across a broad middle-grade and young-adult bibliography, her fiction frequently reimagines classic tale structures or historical settings through an adventure-fantasy lens.