I'd highly suggest getting the standard books/guides:
-Miam Miam Dodo 2016 (for accommodations along the way)
-Michelin Guide (a small packet with the daily suggested routes and elevation)
-This forum!
You can get both those guidebooks online in advance, or in most pilgrim stores/ tourism offices along the way. Or you can ask to borrow them from your fellow pilgrims. Take photos with your phone!
I put together a few tips and guidelines for the Le Puy Camino, including special resources for English speakers (I walked it this year and plan to do it again soon):
solocamino.com
Thanks ChloeRose, I have ordered a copy of Miam Miam Dodo, but you're the first to mention the Michelin Guide.
Love you guide, it's the only one I've seen that is right up to date and written by an English speaking female solo walker.
Thanks again.