Question: What Was Jill's Study Bible?

Answer:
She had the "Reformation Study Bible" which is a great resource. You can find it here at the Westminster Bookstore.

While the Reformation Study Bible is a great resource, an even better resource that only recently came out is the ESV Study Bible. The scholars that worked on it are more broad than the Reformation Study Bible and it has more content. This study Bible can be found here at a cheap introductory price.