The Stolen Sister

"When Elfie's little sister, Rosalind Trelawney, is stolen from outside her school, her parents will do anything to get her back. But Rosalind's safe return comes at great cost.... As Elfie and Joe untangle the threads of the kidnappers' plot, it leads them closer to a devious mastermind who will stop at nothing -- not even murder. It's a race against time to locate the villain before Elfie's family falls apart under the strain."--P. [4] of cover.