Why is the book that Gatsby's father shows Nick important to the novel? Responses It is a book that Daisy once gave him, and shows that she did love him. It is a book that Daisy once gave him, and shows that she did love him. It is the only memorabilia the father has, and symbolizes his relationship with his son. It is the only memorabilia the father has, and symbolizes his relationship with his son. It shows Gatsby's romantic spirit and desire to get ahead. It shows Gatsby's romantic spirit and desire to get ahead. It foreshadows Gatsby's death.