I would positively recommend Augustine's Confessions for someone questioning. I picked this topic because I struggled with my own faith and it sparked a curiosity that I can't contain. I personally have found answers from this book. It is testament to God's salvation for the imperfections of man. 

A more contemporary book I found that matches the questions that St. Augustine was trying to answer is called Soul Revolution by John Burke. I am reading both trying to find my own answers.
(not a very academic answer but a truthful one from my view)