Amara, Bijan, and Chika are friends who love mystery novels. One day, Amara buys a rare mystery novel from an antique bookstore. She reads it and finds the plot utterly fascinating. Amara tells Bijan about the book, describing its intricate plot and the unexpected twist at the end without revealing what it is. Bijan grows curious and wants to read the book but doesn't mention this to Amara. A few days later, Chika visits Amara, sees the book, and becomes interested in reading it as well. Amara, aware that Chika also enjoys mystery novels, lends her the book without telling her about the conversation she had with Bijan. Chika takes the book home and spends the weekend reading through it.

On Monday, Bijan meets Chika and notices she's carrying the book. Bijan casually asks Chika if the book was as surprising as they had heard. Chika, thinking Bijan is referring to the public reviews of the book, confirms that the book was indeed surprising and leaves it at that. Bijan is satisfied with the answer, thinking that Amara must have shared details about the plot twist with Chika too. When Chika finishes reading the book, she returns it to Amara and thanks her for lending such a gripping novel, mentioning how she didn't see the ending coming at all.

After a week, all three friends meet up for coffee. Amara brings up the novel and the masterful twist, poised to start a discussion about it. Bijan and Chika both react with interest but do not reveal any details, waiting for Amara to lead the conversation, uncertain about how much the others know about the twist.

Based on this situation, who is aware of the content of the twist in the novel, who is aware of who knows the actual content of the twist, and who believes more people are aware of the twist than actually are?

Provide a brief response.
Amara is the one person who is fully aware of the content of the twist in the novel. She read the book first and found the twist unexpected and is the original source of information about its existence. When she had the conversation with Bijan, although she described how intricate and unexpected the plot was, she did not reveal the actual content of the twist to him. Therefore, Bijan knows there is a twist, but does not know the content of it. 

Chika also becomes fully aware of the content of the twist after reading the novel that Amara lent her. However, during her conversation with Bijan, Chika assumes Bijan's knowledge about the book's surprising nature is based on public reviews rather than thorough details from Amara. Thus, Chika does not know whether Bijan is aware of the specific content of the twist or not. Bijan, on the other hand, mistakenly believes that Chika is aware of the actual content of the twist due to his misinterpretation of their brief exchange as well as his assumption that Amara told Chika about it just as she had told him of the book's intricate plot.

So, Amara and Chika both know the content of the twist, but Amara believes that no one else knows the twist's content, Chika is uncertain about Bijan's knowledge of the twist, and Bijan incorrectly believes that both Amara and Chika are aware of the twist. Bijan is the one who believes more people are aware of the twist than actually are. Each friend has a different understanding and assumption concerning who is privy to the twist's details.