So You Want to Be a Dragon

When the harbor of Lorando is torched by three dragons, Bekka, her little sister Cora and their neighbor Derry devise a plan to keep the dragons away. They will parlay with the dragons, plead with them. But to get close enough to do that, they must transform themselves into dragons. They ask a shapeshifter for help, and he reluctantly tells them the steps needed to take on the form of a dragon. Can the three children achieve their plan to convince the dragons to leave Lorando alone? If they do, how will they shift back into their human forms?