Out of Darkness by Jordan Quinn

[Little Simon] In the tenth installment of the exciting Dragon Kingdom of Wrenly graphic novel chapter book series, Ruskin and his friends go to war to protect their home. War is close, and the entire realm must choose a side. The Legion of Lava has stirred worry and fear among the regions of Wrenly—some even believe the Legion was created by the Dragons of Crestwood! Such are the evil ways of Valos, the villain who has wickedly turned neighbor against neighbor. Now Ruskin and his dragon friends must wage a war on two fronts: one on the battlefield and one for the very soul of Wrenly.