The Bible actually says fairly little about angels and demons, but popular culture has pushed them into prominence and Christians need to know what to do with this. Tony Evans discusses the functions and realities of the spiritual realm in digestible style.

Angels is not guided by traditions, stories, speculations, or myths about angels. Heiser's study is grounded in the terms the Bible itself uses to describe members of God's heavenly host; he examines the terms in their biblical context while drawing on insights from the wider context of the ancient Near Eastern world. The bible's view on heavenly beings begins with Old Testament terms but then moves into literature from the Second Temple period--Jewish...