Having read both the above books I can thoroughly recommend Ken Follett's historical work. As a student of historical architecture his depictions and analysis of building work in the middle ages are well researched and the stories he weaves are compelling. The way he paints corruption, religion and political aspirations in this period, as well as the grim realities faced by ordinary people, make the plot continually intriguing. I would recommend these books to fans of historical fiction, although the TV series was also pretty good and well worth a watch (if a little bit Hollywood!)