I thoroughly enjoyed this mystery that has two mathematicians as the main characters. As a mathematician, it just tickled that part of me, because I don't find a lot of math in novels. As another reader noted, it loses some of its credibility when one mathematician explains to the other something they both already should know, but in reality it is being elucidated for the reader. This usually works better when written in the third person for that reason. On the other hand, I know when this is happening in a book, and it really doesn't bother me. First person gave us so much more insight into the twists of the tale. I liked that fact that I didn't fully guess the answer to the mystery before the end. Setting a story in charming Oxford is just the icing on the cake. Recommended!
I enjoyed this mystery. Has its mathmatics back story but not enough to scare the non-mathematician. Appeals to those of an accademic bent and those who like English, esp. Oxford settings. Reminds a little of an Inspector Morse story.