Claim: The Divergent Series: Allegiant is based on the novel of the same name.
Evidence: It is the first of two cinematic parts based on the novel Allegiant , the final book in the Divergent trilogy by Veronica Roth , and the third installment in The Divergent Series.
Allegiant is a science fiction novel for young adults , written by the American author Veronica Roth and published by HarperCollins in October 2013.