What are angels? An excerpt from the book 99 Answers to Questions About Angels, Demons & Spiritual Warfare by B.J. Oropeza.
What are angels? Is there an angelic hierarchy? What about fallen angels? And how should we view the Todd Bentley-type 'angels'? What does the Bible say about angels in our time?
What is the purpose of having a doctrine of angels?
People have a tendency to worship spiritual beings, but the Bible forbids the worship op angels.
Christians apologetics research resources on angels