I sure would love to flick through this vintage French maths book illustrated by M.T.Aberdam. It's exactly the kind of book I love.
You might like to keep an eye on newly-opened Vintage Avenue for similar finds from the 50's and 60's (this is the most expensive item by far!) and check out Sarah Andreacchio's very promising blog focusing on vintage children's illustration and design from the same era.
A happy discovery - I'll be following both her blogs from now on.