Also, when you start your camino, they will give you a list of Albergues, and something that is not quite a map, but shows the elevation changes and distances between villages/towns/cities. You don't need a 'map' because the trails are very well marked, you only need to know distances. And like someone just said, there are plenty of guidebooks you can buy online that are helpful.
I did my first week without a guidebook and was fine. After that point, someone by chance gave one to me, but I certainly didn't *need* it
Your pilgrim passport is just that, a passport, and isn't intended to be a guide, though some of them have a sketch of the whole camino on the back.
buen camino!