The murmur of stones

"Brilliant and intense Diana Sears grew up caring for her schizophrenic father, and when her own son, Jason, is diagnosed as suffering from the same afflication, she devotes herself to the quietly heroic responsibility of caring for a child who will never be ordinary - a fact that Mark, her husband, finds hard to accept. When Jason is drowned, Diana just cannot believe the coroner's conclusion that her son's death was accidental. Suspecting her husband, she throws herself into building a case against him, turning to her brother, David, and his family for support. And as the seductive qualities of Diana's manic energy become impossible to ignore, David has reason to fear for his own daughter's safety and sanity."