What is the second book in the Goose Girl Trilogy?

There are three books (as of June 2009) that deal with the same characters: The Goose Girl, Enna Burning, and River Secrets. They don't need to be read in a specific order, but you will know more about the characters if you read it in this order: Goose Girl - Enna Burning - River Secrets. A new book is coming out Fall 2009.