Quinn the Jade Treasure Dragon (Dragon Girls #6‪)‬

A super collectible series that celebrates the inner fire of everyday girls!
Mei, Aisha, and Quinn are Treasure Dragon Girls. They draw on the power of precious gems to transform into mighty dragons. Tasked with keeping the the Magic Forest safe from harm, the Treasure Dragon Grls must come together as a team, embrace their clawsome new abilities, and save the day.

Quinn's dragon powers are uniquely suited to help her find the last remaining item that the Shadow Sprites have taken from the Tree Queen: the Magic Mirror. The Shadow Sprites are growing stronger by the hour, but Quinn isn't worried. She is ready to fight back -- with the other Treasure Dragons at her side.