The Lava CrownBook - 2012
Dr. Hoo has been kidnapped! The mentor of the young heroes has been taken into the hidden kingdom of the enemy. The teens decide to descend deep underground to rescue him, but they are not prepared for what awaits them in the darkness below.
Publisher: North Mankato, Minn. : Stone Arch Books, c2012.
Characteristics: 105 p. :,col. ill. --