This book has been on bestseller lists for a long time so I finally decided to read it, and it is excellent. The story is a cold case mystery covering 70 years, involving a missing boy. The setting is mostly Cornwall with some London interludes, and the story telling switches between 1933 and 2003. The plot progresses in stages, so the slow reveal produces different stages of suspicion. The ending also includes some resolved sub-plots which are a bit predictable, but overall this is a very entertaining read.