Melting stones

"Residents of the island of Starns send for help from Winding Circle temple, and when prickly green mage Rosethorn and young stone mage trainee Evvy respond, Evvy finds that the problem is with a long-dormant volcano and tries to use her talents to avert the looming destruction."@en
""Evvy, the fierce young stone mage introduced in Street Magic, has accompanied her guardian, Rosethorn, on a mission to study a mysterious plant die-off. With the help of Luvo, who is the living heart of a mountain, Evvy discovers the real source of the threat, which is far greater than anyone could have imagined. Preventing a natural disaster may cost Evvy her life. Even more frightening doing so may require her to melt her own hard heart, and open herself to human contact.""
"Evvy has accompanied her guardian, Rosethorn, on a mission to study a mysterious plant die-off. Preventing a natural disaster may cost Evvy her life."@en
"Evvy has accompanied her guardian, Rosethorn, on a mission to study a mysterious plant die-off. Preventing a natural disaster may cost Evvy her life ..."@en
"It's the story of Evvy, the young stone mage introduced in Pierce's bestselling Street Magic, who accompanies her guardian Rosethorn on a mission to Starns Island to study a mysterious plant die-off. with her magic-and the help of Luvo, one of Tamora Pierce's most original creations-the girl discovers a threat far greater than anyone could have imagined."@en