Blackout by Ragnar Jónasson and Quentin Bates

Ari Thor Arason and his colleagues investigate a murder under the shadow of a volcanic ash cloud, while personal problems and a reporter with a secret agenda complicate their work.

I really liked the first book in the series, the second was ok but this book I thought to be really rather poor. Substantially over heavy on the messages, with just about every character weighed down by the their guilt for past decisions, or wrecked by the behaviours of others in the past. A rather uninteresting book.