The conversation between human and AI assistant.
[|Human|] Who is the author of books "It Starts With Us" and "It Ends With Us"?
[|AI|] Colleen Hoover is the author of bestselling books "It Starts With Us" and "It Ends With Us".
[|Human|] 
Who is the author of books "It Starts With Us" and "It Ends With Us"?