Young ruffian Rustav is determined to escape his abusive uncle and hated homeland, even if it means braving the demon-infested forest. His escape is halted, however, when a race of legendary beings reveal him to be the country’s fabled
heir. As the people rally around him, Rustav teeters precariously between raising his people from the dust—or destroying them from the inside.

Review :
An interesting adventure that I believe middle grade to young adult readers would enjoy.  Escaping his abusive Uncle's clutches, Rustav heads to the forest full of Demon's yet get's sidetracked by his injuries and new friends.  The adventure continues as Rustav and his new friend Dantzel flee to the forest. But the forest hides a powerful secret, a secret that could cost Rustav and Dantzel their present, as well as, their pasts and their futures. Can they escape the forest before it is too late and Courei falls to the demons and those who would see the nation fall? And will Rustav discover the truth of who he truly is?

Demon's Heart is an engaging book, but one that I had a hard time getting into at first.  It took a few chapters for me to grasp the content enough to keep reading.  It is definitely the type of book that needs read over a few times to find all the information and clues that were missed the first time through.

Not my personal favorite but one that adventure, fantasy/sci-fi and mystery lovers might truly enjoy.  I would recommend this for ages 14 and up due to abusive situations.