Museum directors and curators get the credit when exhibitions or collections open, but what about the museum designers? Look no further. We turn to one of the world’s leading exhibition designers, Dinah Casson. Her design partnership with Roger Mann since 1984, called Casson Mann, has completed high-profile assignments in the UK, US, Russia, Italy and the Middle East. We dip into her new book, titled Closed on Mondays: Behind the Scenes at the Museum, published by Lund Humphries, and learn about assignments from a proposed UNESCO museum of world heritage outside Turin, under the aegis of AEA Consulting, to the British galleries of London’s Victoria & Albert Museum, to the Lascaux Cave in Montignac in the Dordogne.