The one and only indispensable guide on the section Saint-Jean-Pied-de-Port / Compostella. I had won that one. It is sufficiently complete and has a graphic that allows a glance to visualize the way, step by step (or to make his own steps) its route, vertical drop, villages, supply points and accommodation, aid stations .... in addition to some brief and useful comments. The second advantage, not least, is very low weight! I have needed no other guide, I never lost my (very good Spanish markup) and I was able, thanks to him, finding everything I needed. From personal experience I highly recommend.