The 17th Brother Cadfael Chronicle.

Blurb from the back:
"A marriage has been arranged between an ageing nobleman and a very young woman, ill-matched as January and May must be, coerced by greedy guardians. Both parties arrive in Shrewsbury, where the ceremony is to take place, with escorts suitable to their rank. Then there is a savage killing, something Brother Cadfael is called upon to investigate with his customary clear-sightedness and wisdom.
Outside Shrewsbury's walls stands the leper house of St Giles, a sanctuary for the sick, but also a possible refuge for the hunted man..."

Great read - I think it's one of my favourites among the Cadfael novels I've read so far. Many twists and turns that I REALLY did not expect!
This book has been requested as part of a swap and is waiting for another to join it and be sent out...

Got it! Thank you very much.

I really loved this one with all its details of the customes and way of life at the time.
Not to mention all the murder and mayhem.

Took this book from a bookcrossing meet in Edinburgh, because I enjoyed the Cadfael television series. Am still reading it, so I suppose it's a bit early to comment, but am intrigued to find that a young woman's eyes are described as 'iris-grey' in chapter 1, and 'purple as irises' in chapter 3. So her eyes changed colour? Or maybe they had coloured contact lenses in 1139? (If the author couldn't keep track of the physical attributes of her character, didn't she have an editor?) At least on tv the actress's eyes stayed the same colour! Anyway, I'm probably being way too picky, and will keep reading.

CAUGHT IN EDINBURGH SCOTLAND