How I love this series - everything historical whodunits ought to be.  Engaging characters that seem of their time, plenty of description, an exhaustive underpinning of period knowledge and a rattling good plot.  There is some low-key romance in here too, treasure hunting, information about Beltane and one of the joys of a series, the chance to catch up with what the characters have been up to.  One drawback in this delight is that there seems to be quite a gap between each book, and at this rate the characters are going to be old before the series is very long.  This is my only complaint however, and as usual the pacing, packed plot and sense of gathering momentum awed me. Very highly recommended.