The writing is hardly the most spectacular I've ever encountered, and there was something a bit anticlimatic about the ending, when it seemed as though a trial involving the veracity of saints' bones and high treason sort of devolved into a game of childhood rivalries. And there were a number of missed opportunities in terms of certain characters - occasionally she was just a bit too conventional when she could have made it so much better by playing with a trope instead of playing it straight.
Still, if you want to read a book set in a research-based Anglo-Saxon England that gives you a pretty great feel for what life could have been like, and how various peoples got on, and the experience of faith in the early medieval period, that also has an absolutely fantastic Norse lady of war/merchant princess set against a deeply endearing secretary and cathedral subdeacon about two miles in over his head, or anything like that, I'd still recommend it. I'm definitely going to buy her second book 'The Traitor's Pit.' The historical plausibility alone makes it worth the read.