Curriculum guide/bookfinder question

I’m getting ready for module 5, and there was a book on sale online by the Maestros, Liberty or Death: The American Revolution.  So I looked it up in the bookfinder and it says it’s for Module 5, grades 1,2,3.  But it’s not in the curriculum guide for Module 5.  So is it just that it used to be on the list, or do I still need this book and am not looking at the guide correctly?    Thanks so much. obviously still new to SCM:)  Adrienne