Think about the worst book you can imagine. The plot is boring and stuffed with long moments of filler content. The characters are completely unlikable, if not outright annoying. The protagonist is a total piece of ****. You aren't even halfway through and can't believe you're still reading page after page of this tripe. Now imagine this book is actually 23,389,200 pages long, and you are trapped in a small, dark room that you cannot leave until you're done reading the whole thing. You have no memory of anything from before you got there, and you're pretty sure whoever has trapped you there is just going to kill you when you're done anyway.