You may already be familiar with information from Catholic Answerrs, but as there are others who either join the conversation or follow it, I will add one available from CAtholic Answers.
The book Inside Mormonism is written by Isaiah Bennet. He started life as a Catholic, became a Catholic priest, eventually abandoned that to become a Mormon, and eventually returned to the Catholic faith, albeit not to the priesthood.
This is not a “been there, done that” book so much as a thorough explication of Mormon beliefs from the viewpoint of a Catholic who has been immersed as deep if not deeper than your ordinary LDS member - and perspective of a Catholic who has likewise been more immersed in Catholicism than the ordinary Catholic.
At 488 pages, and an additional 5 appendixes and a fairly extensive bibliography, this is not a short read. However, it is a thorough one.