There are two free eBooks which are worthwhile to download and read. The first is The Confessions of St. Augustine which is a spiritual classic every Christian should take the chance to read. The other book, 20 Compelling Evidences That God Exists, by Kenneth Boa and Robert Bowman is focused on the reasonableness of believing in God.
“Confessions is one of the most moving diaries ever recorded of a man’s journey to the fountain of God’s grace. Writing as a sinner, not a saint, Augustine shares his innermost thoughts and conversion experiences, and wrestles with the spiritual questions that have stirred the hearts of the thoughtful since time began. Starting with his childhood in Numidia, through his youth and early adulthood in Carthage, Rome, and Milan, readers will see Augustine as a human being, a fellow traveler on the road to salvation. Though staggering around potholes and roadblocks, all will find strength in Augustine’s message: when the road gets rough, look to God! Previously released in 1977, this book invites readers to join Augustine in his quest that led him to be one of the most influential Christian thinkers in the history of the church.”
“Is it Reasonable to Believe? Remarkably, even though millions upon millions of us do believe in God, when we are asked why we have such faith, we become tongue-tied and struggle to give a reason for our hope. No wonder those who don’t believe God exists remain unconvinced—there’s too few of us ready to speak on God’s behalf! Ken Boa and Robert Bowman have provided a resource that tackles the most profound arguments from philosophy, science, sociology, psychology, and history … and presents twenty clear, concise, and compelling evidences that show that faith in God—and specifically Jesus Christ—is reasonable.”