Books like So, What's the Difference? by Fritz Ridenour

C.S. Lewis’ radio talks, later published as three books, are compiled in "Mere Christianity," a clear apologia that explores core Christian beliefs and ethics across denominations.

Lee Strobel guides readers on a rigorous investigation into the evidence for Jesus as the Son of God, challenging scholars and examining historical, textual, and scientific arguments.

It is the purpose of this book to evaluate the so-called cults and isms that today are found in abundance in America and on the great mission fields of the world. My approach to the subject is threefold: (1) historical analysis of the salient facts connected with the rise of the cult systems; (2) theological evaluation of the major teachings of those systems; and (3) apologetic contrast from the viewpoint of biblical theology, with an emphasis upon exegesis and doctrine. - p. 18. Since the first edition was published in 1965, Walter Martin's The Kingdom of the Cults has been the leading reference work on the major contemporary cult systems. With an emphasis on the currently active, proselytizing cults, The Kingdom of the Cults continues to be a crucial tool in counter-cult ministry and evangelism. While remaining true to Walter Martin's original tone and text, this updated edition includes substantial new information. Relevant and accurate materials have been reintroduced from the original editions, preserving Dr. Martin's unique voice and defense of the faith. Scholarly yet readable and engaging, The Kingdom of the Cults evaluates each cult's history and beliefs, contrasting individual teachings with true biblical theology. Readers will find apologetics help in dealing with cults not only at home but also overseas. An invaluable reference work for both scholars and laypeople. - Jacket flap.