Matthew Poole is a highly-regarded Puritan scholar and preacher. This work of his has been out of print for nearly 200 years. It is a dialogue between a Roman Catholic priest and a Protestant, old friends who meet after many years and decide to discuss the differences between their various religions. Poole uses official Roman documents for the arguments of that faith, and the Protestant appeals to Scripture and logic in answering back.
This is a rare chance to sit in, as it were, on a Puritan debate. It is easy to find a polemical work from either side of these issues, but it is very difficult to find a work where there is a back-and-forth dialogue fleshing out the differences and making clear the heart of the matter. Both sides can be wrong, but they cannot both be right.