1517 Books on Apologetics: https://shop.1517.org/collections/books/apologetics
1517 Audio on Apologetics: https://shop.1517.org/products/sensible-christianity-mp3
1517 Resources on Apologetics: https://www.1517.org/topics/christian-apologetics
Mere Christianity by C.S. Lewis
The Minimal Facts Approach by Gary Habermas