I am desperate to own a book I read as a child in the 1970s.
It's an English translation of a Dutch book about a boy who is trying to learn his 7 times table. He shrinks and has a series of adventures which enable him to learn the facts (eg having to defeat 7 spiders by counting their legs 7 x 6)
I really want to give this book to my own daughter, but I can't find it anywhere; amazon, e-bay, obscure out of print book sites.
It's called (I think) the 7 times search. If you have this book hidden in an attic and you are willing to part with it, I will pay.
A long shot - but MN has helped me out in obscure situations before.