How many books are there going to be in the Leven Thumps series?

There are currently four books in the Leven Thumps series by Shannon Hale:

1. The Goose Girl (2003)

2. The Goose Boy (2004)

3. The Goose Girl's Secret (2011)

4. The Goose Girl's Return (2022)

While there are no official announcements for a fifth book, Shannon Hale has mentioned in interviews that she has ideas for continuing the story, so it's possible that more Leven Thumps books are in the future.