H.A. Baker uses his extensive knowledge of Scripture and vast experience as a missionary for 60 years to Asia to teach about demons. He builds a strong case for believers to be aware of the fact that demons are very real. They are able to possess human bodies and communicate in human language. Some have supernatural strength; others are able to foretell the future. Demons are especially opposed to any outpouring of the Holy Spirit. If they cannot shut it down, they will bring confusion by counterfeiting God’s work. This is why we find the door for false prophecy and miracles from the world of darkness open widest whenever there is an outpouring of the Holy Spirit. Some churches are unaware of what is going on, others respond with fear and shut down God’s miracle-working power. H.A. Baker exhorts churches to seek the gifts and fruits of the Spirit and to make sure that they do not fall into deception. God equipped the church with all they need to the Bible, the Holy Spirit and the specific gift of discernment. Finally, no matter how intimidating the show they put on, any Holy-Spirit-filled believer is equipped to cast out demons.
Harold Armstrong Baker (1881–1971), known as H.A. Baker, was an American author and Pentecostal missionary to Tibet from 1911 to 1919, to China from 1919 to 1950, when forced to leave the mainland, and then in Taiwan from 1955 until his death in 1971.
With his wife and co-worker Josephine, Pastor Baker began the Adullam Rescue Mission for street children in Yunnan Province, China. The children in the home, mostly boys aged from six to eighteen, began to have spiritual experiences, claiming to have seen Heaven through a series of visions. These visions were recounted in Baker's book Visions Beyond the Veil.
He was also the author of Heaven and the Angels, Plains of Glory and Gloom, The Three Worlds, Tribulation to Glory, Through Tribulation, Visions Beyond The Veil, and other books. His little known last book, written at the end of his life, was called "My Goodbye Book".