In America, public perception of Islam is skewed, sometimes presented as a religion of peace, sometimes as a belief system very similar to Christianity. These depictions, among others, can make decisions based on this information difficult. R. C. Sproul (The Holiness of God) and Abdul Saleeb (Answering Islam, 2d ed), an ex-Muslim, have no other agenda but to serve the American community by warning the world about this global threat. Clearly delineating where Christianity and Islam differ, the authors discuss core Christian doctrines, such as salvation and the nature of God, this book builds off of both Saleeb's earlier book (co-authored with Norman Geisler) and Sproul's earlier When Worlds Collide: Where is God in Terrorism, War, & Suffering?, going more in depth to address those specific issues which most confuse the issue concerning the difference between Christianity and Islam.