We go by a term called the codex, where they would have two heavy pieces of wood which become the cover, and then the pages in between would then be stitched along one side to make something that was relatively easily transportable.
Passamos por um termo chamado códice, em que havia dois pedaços pesados de madeira que compunham a capa, e depois as páginas no meio eram costuradas de um lado para criar algo relativamente fácil de transportar.