The Miam Miam dodo has a reputation as being "the bible of the Le Puyroute". If you want to use a paper guide, that would be the way to go. If you want to use a smartphone there would be better options I think. 2 weeks ago I received a notification that the Miam Miam Dodo is again available as an ebook. This makes it to me much more userfriendly ( better search options, possibility to e large maps and so on)
I carried the two volumes of the paper Miam Miam dodo and did not use them at all, after two weeks I gave them away. The route is very well marked, the few times that somethings were not 100% clear, I had to open my backpack, take out the books and then it was not very easy to locate your location on the many maps. (Each stage ison sometimes 5 maps)
I found Gronze.com much more easier to use, It is in Spanje, but if you have "chrome" on your smartphone you can translate. It had everything I needed, a global map with distances, profile of the route, names of albergues, "clickable" contactinformation, routedescriptions and mentioning of possible problematic situations, customer reviews of albergues and so on.