The book "Satan's Invisible World Discovered" was authored by Scottish preacher and academic George Sinclair. The inquiry in the book looks at the alleged presence of witches, devils, and other paranormal beings in 17th-century Scotland. Sinclair bases his assertions regarding the presence of witches and demons in Scotland on a mix of biblical texts, historical documents, and first-hand testimonies. He gives instances of purported witchcraft trials and executions and goes into great depth on the various means by which witches are said to harm others, such as spells and curses. The book also explores the theology that underpins evil's existence and Satan's place in the universe. Sinclair contends that the presence of witches and demons is evidence of Satan's power and that a steadfast Christian faith is necessary to fight it.
Scottish preacher and scholar George Sinclair lived from 1618 until 1696. His most famous work, "Satan's Invisible World Discovered," examines the presence of witches, demons, and other paranormal creatures in 17th-century Scotland. Sinclair was a highly educated individual who earned degrees from the Universities of St. Andrews and Edinburgh. During the Civil War, he also worked as a chaplain for the Scottish Army. He eventually held various important roles in the Church of Scotland. Along with "Satan's Invisible World Discovered," Sinclair has authored a number of other books on religion, philosophy, and natural history. He was well-known for his ability to make complicated concepts understandable to a broad audience, and his writings were extensively read and regarded in his day.