This is the story of a family torn apart by a father's obsession with a daughter whose existence he actually shouldn't be aware of. A chance remark by a doctor inadvertently blows the gaffe; one of the embryos he and his wife donated is now a healthy baby girl. At first, Mark Elfick struggles to stop himself following his natural protective parental instincts, content with observing from a distance. Then a murder changes everything, and as a result his desperate need to become involved in this second child's life jeopardizes the happiness of both families concerned, damn near destroying his relationship with his wife and their own daughter (who is, of course, technically his second daughter's twin).
Cook's writing is similar to Jodi Picoult in the way she takes a topical issue and places it within the context of the lives of ordinary people, sending them spinning off the tracks of their everyday lives onto a gut-wrenching roller-coaster ride into uncertainty and chaos.
I couldn't put this book down until I'd devoured it to the very last page.