Hi, The best books that will lead you to God will must be in harmony with the Bible. Read all the books of Ellen G White. Specially the one: “Step to Christ.
One of Michael Horton’s older books, “The Law of Perfect Freedom: Relating to God and Others through the Ten Commandments” might be worth looking at. I read it a long time ago, and it was helpful for me in understanding Reformed approach to God’s moral law.
It’s a lot shorter than Frame’s book, btw. A *lot* shorter