Kelly's best yet. Read in three days flat, interrupted only by work and the occasional meal. Couldn't put it down. Norfolk landscape once again broods over all, this time in a heatwave, with a classic "locked-room murder" set on a remote island. No one can have done it, yet someone did. I mourned the departure of Kelly's first sleuths - journalist Philip Dryden and his sidekick Humph the cabbie (The Water Clock, Firebaby et al) - but DI Shaw and DS Valentine are gaining ground. New layers of vulnerability add flesh to the odd partnering, and a cast of wonderful characters is gathering strength around them. Recommend.