For we do not wrestle against flesh and blood, but against principalities,
against powers, against the rulers of the darkness of this age, against spiritual hosts of wickedness in the heavenly places. (Ephesians 6:12)
Frank Peretti is an excellent mentor for Christians with the gift of Discerning Spirits. His novels, This Present Darkness and Piercing the Darkness, are an excellent picture of how angels and demons interact with us. He helps us understand how active the spirit world is in our communities.
Frank Peretti shows an event from the angel’s, demon’s, Christian’s and non-Christian’s perspective at the same time. He explains the angel’s goals and objectives in contrast to the demon’s goals and objectives. He shows how prayer impacts the outcome of the clashes between the angels and demons.
I highly recommend these two books.