Out of the Silent Planet

In 'Out of the Silent Planet', Dr. Elwin Ransom, a philologist, is kidnapped by his old school acquaintance Dick Devine and the scientist Edward Weston.

They take him aboard a spaceship bound for Malacandra (Mars).

Upon landing, Ransom escapes and encounters the planet's inhabitants, including the humanoid hrossa and the angelic eldil.

He learns that Earth is isolated from the rest of the solar system and eventually meets Oyarsa, the ruler of Malacandra.

After a series of adventures and interactions with the planet's diverse species, Ransom is directed to return to Earth along with his captors, who are ordered to leave Malacandra immediately.