<P> A prequel novel called Rise of the Isle of the Lost was released on May 23, 2017 . The novel details Uma's rise to power and her earlier history with Mal . The main plot details Uma planning to get the migrating trident of King Triton in order to help bring down the barrier surrounding the Isle of the Lost . </P> <P> In addition to the mentioning of Genie, Grumpy, and Merriwether being teachers at Auradon Prep, a third school called the Serpent Preparatory School for the Education of Miscreants is located on the Isle of the Lost which Uma, Harry Hook, and Gil attended . Serpent Prep is a rival of Dragon Hall . </P> <P> The book also introduced Yen Sid's Auradon intern Sophie, Ariel's niece Arrabelle, and Mulan and Shang's son Li'l Shang who is Lonnie's brother . There was a mentioning that the Stabbington Brothers from Tangled are also on the Isle of the Lost where they have Stabbington Cousins . Other information listed here that was later referenced in the film was Audrey and Chad breaking up, the introduction of R.O.A.R., Mal keeping Maleficent's lizard form as a pet, and Evie having her magic mirror placed in the museum . </P>

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