Unwilling Librarian and Losing Custodian

Alistair,

Bought a used bookshelf about three weeks ago. It came with some old books, which I threw out. Every day since then, the shelves have been refilling themselves with books. Anything I set on the shelf is pushed out the next day and replaced with a random collection of old books. What, exactly, is going on here, and what should I do about it?

Unwilling Librarian in New Delhi

AND

Alistair,

I got a bookshelf from a garage sale, as I’m an avid collector of first editions. It seems, though, to be “eating” the books. I’ll fill it up, and then the entire batch will disappear overnight. I can’t figure out where they’re going. Help!

Losing Custodian in Nassau

Unwilling Librarian and Losing Custodian,

Trade.

Alistair