There are two good Camino Primitivo guidebooks written by the same author, whichever you buy is dependent on the information you need for other routes as both cover more than one route. The Northern Caminos (The Caminos Norte, Primitivo, and Inglés) and Camino del Norte and Camino Primitivo both books are written by Dave Whitson and Laura Perazzoli, and published by Cicerone Press. The guides are exceptionally detailed and what is most important, up-to-date. Besides information on the routes, terrain, and accommodation, they include colored maps, an overview of historical monuments along the way, advice on gear as well as a vocabulary of basic Spanish words and expressions.