The ShapeshiftersBook - 2015
"Summer 1978. A young boy disappears without a trace from a mountain cabin. His mother claims he was carried away by a giant. He is never found. Twenty-five years later, another child goes missing. This time there's a lead: a single photograph taken by Susso Myren. Myren has devoted her life to the search for trolls, legendary giants known as stallo, who can control human thoughts and assume animal form. Convinced that trolls are real, she follows the trail of missing children to northern Sweden"--Page 4 of cover.
Publisher: Boston : Mariner Books/Houghton Mifflin Harcourt, 2015
Characteristics: 587 pages : map ; 21 cm
Alternative Title: Shape-shifters