I found the fugue is not as difficult as the C-Major from book one. Look out for measure 30 - It can be tricky. The other tricky part (at least for me) was mm 24 and the following - where the right and left hand answer each other.I have played it slowly, pensively, however, most recordings tend to take it much faster (Schiff and Hewitt). I've tried to take it faster, but it loses (at least to me) some of the mysterious nature that Bach put into it.It's lovely. Enjoy!George