The problems with building pyramids don’t start with stacking big stones on top of other big stones. Sure, that’s one problem, but when you get to that point you solved a couple of other things already. Like how to get big stones when all you see around is sand. That part of the operation is the focus of Phil Walker-Harding’s Imhotep: get stones from the quarries down the Nile and to the construction sites, on ships you have to share with other architects working on the same project.