Am I getting old or what?

Answers (kind ones only) on a postcard please.

This book, absolutely brand new, has 'turned up' in our house.

Neither of us can remember ordering it. Neither of us can remember unpacking it. We certainly did not buy it from a bookshop.

At least we can't remember doing so.

A mystery, but one which looks good and is next on the 'to read' list.

I'll let you know what it's like.