Giant Book set design

Hi. My name is Jason Bancroft and i am a Drama Teacher in Western Australia. For our next production, i would like to make the set a giant book measuring 3m tall with pages 4m wide. Each page could then be turned (on casters) to set the next scene providing a total of 4 scenes comprising of 3 pages and a front and back cover. Visually, i can see what i want but our maintainence team at the school are having difficulties coming up with a construction solution. We are able to bolt the spine of the book to a brick wall but are unsure how to create braced pages that are light enough to move. Anyone who could offer any insights would be greatly appreciated. Thanks.