This is the eighth of a series of about 13-14 Inspector Pel novels. Very good police procedural-type mysteries. This one is published in the UK, as are they all.
My very used paperback is old "1982" but the reading was great--2 stories in one on how the French police solve the murder of a young boy and the killing of 3 policemen & a citizen. A simple murder and a terrorist plot all rolled into one story. Hebden writes in the style of a cozy English mystery.