My Mum and Dad bought me 'Haunted House' and 'Robot' both by Jan Pienkowski, sometime in the late 70s. As pop-up books go, they are works of art. I've never such intricate work in a pop-up book! There wasn't really a 'story' to them, just amazing artwork. They are, thankfully, still available...if you have kids of 8 or so, buy them these books - they'll love them and you'll love to see them again!