If you were a library book, where would you hide?

I lost a school library book in year 6. I remember it vividly. We paid for it, then I found it in a forgotten corner corner of the classroom. 

And it never happened again. Until this year. 

This year, we've lost three. 

The first was one of those little skinny Mr Men books. Yep, that was bound to happen one day. We have floor cracks big enough for one of those. 

The second was a DVD that evaporated between the car and the returns desk. 

The third was due back today. There has been much hunting. It's a reasonable sized board book, so surely it can't be that hard to find. 

Time to bring back the 'kids library books only in the lounge room' rule. We were doing pretty well at this until F found her book-loving side and now she wants to take them all over the house. 

I've looked in bookshelves, cupboards, under couches, beds, the piano... Do you have any ideas?