At the destruction of Medusa, she was asleep, but in the movie, Medusa was prepared and ready for her incoming guests. Considering another difference was that Medusa’s head was a trophy of victory to show Polydectes, Perseus’s bravery and there was no mention about the Kraken in the book theory. The theories that were identical was the mention of the Graeae and the eye along with the use of Perseus’s shield that beheaded Medusa.
In H.A. Guerber’s The Myths of Greece and Rome, Polydectes wanted to get rid of Perseus in order to force Danae, Perseus’s mother to marry him. Perseus boasted that he could slay Medusa in order to prove his bravery to Polydectes and the people. Medusa a mortal was one of the three Gorgons and sister to Euryale and Styno who were immortal. Medusa was handsome and her home was in a land where the sun never shone. She asked Minerva (the goddess Athena) if she could visit the sunny south, but Minerva refused. This upset Medusa and she declared Minerva no longer beautiful. This infuriated Minerva to punish her for her own beauty and changed her into a hideous monster. The gods favored Perseus and provided assistance from Pluto who provided a magic helmet, which the wearer would be