The Mystery at the Alamo Audiobook

The Aldens are visiting the Alamo with their grandfather. They arrive at the Alamo to find that a movie is being made there — and they are going to be in it. But then things start to go wrong on the movie set, and a priceless ring from the Alamo Museum disappears. Are the two things connected? It is up to the Boxcar Children to solve this new puzzle!