One of my goals here is to encourage you to learn more about "the faith that was once for all entrusted to the saints." There are countless fine books to choose from, but a lot of people have little time to read.
Biblical Training.org helps you in that endeavour by making audio of Christian teachers available on the web for free.
Classes on a variety of topics (including biblical studies, theology, church history, apologetics, Greek, ethics, and ministry) are taught by respected teachers (including John Piper, Craig Blomberg, and the late Ronald Nash) at levels appropriate for new believers, laymen, and leaders.
Free registration will give you access to hours and hours of Christian instruction to help you grow in your knowledge of the Faith.
Whether you take advantage of their classes or not, you might find their recommended reading lists useful. These can be found at Support Ministry.com.
Also, that site has referral buttons that will take you to Amazon or Christian Book.com. By visiting your favorite online bookseller through these links, you can support the work of these folks without paying an extra cent yourself.
Once again, the holiday shopping season is upon us, and if you're going to order books online, may I suggest that they are well worth your (free) support.