Let's see... well, the fifth Harry Potter book, The Order of the Phoenix, was very long.  But I also read The Sweet Far Thing by Libba Bray, which was one of the favorites.  Plus, The Historian by Elizabeth Kostova was a bit long, but I read that one so long ago that I do not remember much about it.  I'm sure there are more that I have read but those are all that I can remember at the moment.  Out of those, my favorite would be The Sweet Far Thing by Libba Bray, because Bray is always so brilliant.  

What is the longest book you have read?  I hope you all have a great weekend.  Happy reading!