With regards to Christianity, I usually recommend people start with two books.
“The Pursuit of God” by AW Tozer “Studying the Holy Scripture’s” by Paul Washer
Washer’s is a workbook that explains the thoughts and methodology to understand the Bible well. Both are roughly 6 dollars each on Amazon. Please let me know if I can help in any way.
This book touches on those topics, although briefly. It's in a workbook format if that appeals to you. The content is excellent.
The Canon of Scripture is an in-depth study of how and when the decisions were made on which books to include in the Bible.
If you don't need to go as in-depth but would still like good information, Josh McDowell's "More Than A Carpenter" and "Evidence That Demands a Verdict" also touch on these subjects.
Feel free to send me a message anytime if I can answer anything.