I am trying to construct a giant book made with plywood for the corner of a children's room. How should I go about constructing the binding/support for the book to stay standing, and also be able to open the book 90 degrees?

We are using several wall panels that had children’s murals painted on them and planning on using the panels as the pages of a giant book. The panels are each about 4 feet wide x 90 inches tall. We are designating it to a corner of a children’s room, so the book can only open 90 degrees from it’s closed form. What can be done to help keep the wooden pages standing straight, and able to swing 90 degrees?

One idea was to put hinges on each page and then securing it to a wooden post that would stand at the apex of the corner of the room, but that will only about 5 inches width for the post. There are about 8–10 wall panels, each about 1/8–¼ inch thick. We were also thinking perhaps using some kind of metal hoops as one would use on a binder for the pages to rotate on, but haven’t found large enough u-loops for that. Does anyone have any ideas on how to make this kind of giant book sturdy, and be able to swing multiple wood pages as one would a door?