If you have been a Christian for any amount of time, you have encountered questions in one form or another about what you believe and why you believe it. It may have been a question from a friend or coworker, a post on social media, or maybe it is even a question that you ask yourself. However it arose, it is a question of which you are not quite sure of the answer and need to research more fully.
Fortunately, we live in a time when resources are widely available to answer these questions. Below is a list of apologetic book collections. Some of these are those that I read in my apologetics program, others are ones that I have come across individually.