Beautiful art picture book for all ages about M.C. Escher.

Nadir and Zenith come to a place that is so strange they can’t even tell if it’s real. Their curiosity is aroused and they look further. And further. Going deeper and deeper into the weird and wonderful world of M.C. Escher, where nothing is quite what it seems. Fortunately Mr Escher helps them find their way. Or is it the other way round?
Beautiful art picture book about M.C. Escher.