Out of the Silent Planet
1938 Novel by C. S. Lewis
Out of the Silent Planet is a book by C. S. Lewis. In it Dr. Elwin Ransom is kidnapped and brought to Mars by Professor Weston and Dr. Richard Devine. Dr. Ransom escapes and finds out that Mars is ruled by an alien space Angel called an Oyarsa who was sent there by Maleldil.
It was first published in 1938.