Delirious concerns an aguing couple, Mary and Pete, a former cop and librarian respectively, who, in their late 70s, are selling their suburban house and intending to move to a retirement village. Their son was killed as a child in an accident 40 years before, and new information comes to light about his death. This triggers memories of other family grief, and as this well told and emotionally astute story unfolds, we learn a lot about the challenges of ageing, dealing with loss and grief, and how we deal with each other in relationships. It's a quite brilliant and emotionally confronting novel, a wise and thoughtful, but compelling book.