I just finished Foxe's Book of Martyrs. It was a long a difficult read, firstly because it is not altogether heartening to read about people being burnt for 410 pages, but also because the language is that of the 16th century. Which even I don't speak fluently. A word of advice for all who wish to read it - divers means diverse, or more accurately in modern English, various.
But I did like it. Even if I could only read 20 or so pages at a stretch.