This psychological mystery explores a child’s deepest genetic need for belonging. Sam has darkly unfathomable dreams and vague memories: a cat, a boat, a storm, a bold castle, a mean woman, the number 11. As he turns 11, questioning his own identity, these dreams and memories drive him to take devious, even dangerous, risks to uncover the truth. His sleuthing is thwarted by his inability to read—literally—the clues he finds in concealed papers and on the Internet. He is joined in his search by Caroline, another seeker, who reads voraciously but is never in one school long enough to achieve acceptance. Together the two form a friendship, building a castle as a classroom project and exposing secrets that empower Sam to confront his family about his clouded history. In a satisfyingly poignant conclusion, both children stand at the threshold of inclusion and kinship. An engrossing examination of a profound theme in the deft hands of a discerning author. (Fiction. 9-12)