Mentioned by a HPMoR reader as being a good example of how Harry fails at morality. Its wikipedia summary sounds interesting, something about exploring the question of where the archetypal 'wise old wizard' comes from.
I think I bought it for Hayley in 2012ish, and I bought it for myself on 27th July 2014 when I found a second hand copy for £1.50 at The Folk Forest in Sheffield, as well as Mansfield Park and The Master and Margarita.
First read (December 2015]]Edit
Picked it up on the 28th of November 2015 and read it in a couple of weeks. I'm not sure why I started reading it. Maybe it was because my class had been blogging with a class in America whose teacher seemed to read a lot and it made me realise how little I was reading despite the fact that I ought to have settled into teaching. Or it might have been because I'd gotten a job in Japan which kinda changed my perspective on the teaching part of my life from November to when I left in mid-December.
I read it fairly quickly and found it easy to read, but it didn't do much for me. It was quite simple and I didn't find the setting and characters greatly compelling. I mean, I'd say it was well written and I enjoyed it, but it didn't pull me in.