Originally Posted by
Palmatum
I've only ever looked into Christian Theology really, but here are the books I have.
King James Bible.
English Standard Version Study Bible.
Mathew Henry's Bible Commentary.
The Oxford Bible Commentary.
Calvin's Commentaries - John Calvin ( Really awesome 22 book set and you can get the whole set for about 150 pounds on Amazon, cheaper in the US. )
Layman's Bible Commentaries - Mark Strauss, Stephen Leston ( These are super cheap for the set and really good )
Christian Theology: An Introduction - Alister E. McGrath