something odd happened today

Last weekend I went to my local public library (which I love), where I spotted a book that was on my to-be-read list. I keep a list of books I want to read, and periodically search the library's catalog to see if they have it at any of their branches. I had this book noted on my list as being held in the collection of my local branch. Depending upon how much I want to read the book, I'll put a hold onto the book if they have it in the collection but it isn't checked in. This is a book that held a middling position on my list for a while, a 2007 sequel to a science fiction novel by a newish but award-winning author which I liked but didn't love, but thought might be interesting. I grabbed the book off the shelf, but, in the process of wandering around and gathering up other books, I must have set it down and it didn't make it to the self-checkout with me, something I didn't discover until I got home. Ah well, I knew I'd be back this weekend, and maybe it would still be available.

I returned today and wandered over to the shelf. It wasn't there. I decided to look the book up and see when it was due and put a hold on it this time.

It wasn't there any more. It wasn't in the catalog, and the author wasn't in the catalog either.

I left with the books I found and one that was on hold for me. I considered asking about the missing book/author, but there was quite a line and I didn't want to hold people up while I asked my crazy-conspiracy-sounding questions -- how did this author and his books disappear in the last week? And why?