Proof - THEY want me to be short tempered through lack of sleep...
Alcatraz Versus the Evil Librarians by Brandon Sanderson
Page 251

That means five books came off Mt. Bookpile during that time. But I added two more since I came home. My brother was buying a book for my daughter's graduation present, so I bought one at Barnes and Noble. Then I HAD to show off Mysterious Galaxy, and (of course) bought something there as well. I've now added two books to Mt. Bookpile. Of the five I took off, two were received in the last month. That means I've only removed one book net from Mt. Bookpile. It is a never ending battle that Mt. Bookpile will win...