The Door into Summer

Main Characters and Their Development

• Dan Davis - the main character, a talented engineer and inventor. At the beginning of the book, he is full of enthusiasm and plans for the future, but his partners and fiancée betray him. After this, he decides to freeze himself for thirty years. Upon waking in the future, Dan finds a way to return to the past to correct mistakes and prevent betrayal. Ultimately, he finds happiness and love.
• Pete - Dan's cat, a loyal and faithful friend. Pete accompanies Dan throughout the story, symbolizing constancy and loyalty.
• Belle - Dan's fiancée, who betrays him for her own gain. At the beginning of the book, she seems loving and caring, but her true nature is later revealed.
• Miles Gilbert - Dan's partner, who also betrays him. At the start of the book, he appears to be a reliable and businesslike person, but it later becomes clear that he is willing to do anything for money and power.
• Ricky - a young woman who becomes Dan's love interest in the future. She helps him adapt to the new time and supports him in difficult moments.