Answer a Question: What is the longest book you've ever read?

The longest book I've ever read is Bleak House by Charles Dickens. I'm generally a really fast reader but honestly, it takes 2 solid weeks to read Bleak House. Not only because of the length, but also, I mean, Charles Dickens. He's a heavy read. And sometimes wordy. It took me forever to straighten out the different characters in Bleak House. And that's with a very good character list at the beginning. And even though it is a little difficult, Bleak House is one of my favorites of his. What's the longest book you've ever read? How long did it take to read it? Let me know in the comments.