Krish Kandiah's new book is really very good. Christianity is full of paradoxes which are not meant to be solved, but properly and reverently held in tension. Krish's book doesn't give you simplistic answers to complex problems, therefore, but encourages us to do more than accept these paradoxes; rather, Christians ought to actively rejoice in them.
After all, we worship a God who is Three-in-One.
Here's a brief introduction.