This isn't the first time I have had this problem, but it's the first time I gave it a name. What I realized as I was deleting ebooks from my device, removing them from my Goodreads shelf, etc. was that I can only read a book for so long before it becomes a chore. Even if I like the book, I need to either stop reading or risk a major reading slump, in which I force my way through that book and end up reading nothing else for a month afterwords. If I've been currently reading a book for too long, it seems to hit an "expire" and I don't have fun reading it anymore. Even if it's a great book!
I rarely read classics for this reason. Whenever I do begin them, I usually read lighter books alongside them, as they are typically slow-paced and sometimes are pretty long. But then, they take forever to read. And I don't want to read them as much as all the other books I could be reading.
I don't want to say that slow-paced books aren't for me, because there are some that I read and loved! But I have to be in the right mood for them. When I tried to continue The Night Circus, which I had been slowly making my way through since the middle of last month, I realized I just haven't been in the mood for it. Sure, I am interested in the story. It's a great book, and I want to know what happens. Right now, though, there are other books I will enjoy reading more.
I'm really interested to see what you guys have to say about this. Have you ever had a book sit around so long, you just don't want to read it anymore? (This happens to books on my TBR shelf, as well as my currently read books!) Do books "expire" for you, or can you read them bit by bit without feeling bothered by it? How long can you take to read a book before you begin to think about everything else you could be reading?