The Serpent's Heir

How to Train Your Dragon: The Serpent’s Heir is an upcoming graphing novel co-written by Dean DeBlois and Richard Hamilton. It set to be published in 2016. This graphic novel takes place mere hours after the end of "How to Train Your Dragon 2".

Overview
Berk’s Dragon Riders must answer an earthquake-plagued island’s distress call. Along the way, they meet new dragons and a disturbing enemy, all while Hiccup and Toothless are growing into their roles of Chief and Alpha.