Hi
@TonyScotland
I was just typing as
@Flog posted. I agree. I think Gronze is all you need for distances, elevations and accommodation . I've walked the Aragones a couple of times, plus a few stages backwards, and never had a guidebook or map or app of any kind. The route is well waymarked.
For information on history, geology, art ... you might be interested in The Pilgrimage Road to Santiago. I have a kindle version. It covers both of the routes across the Pyrenees. Part 1 chapters 1 to 15 deal with the section from the Col du Somport to Puenta la Reina.
Discover why The Pilgrimage Road to Santiago by David M. Gitlitz is such a great book to read.
shepherd.com
It's a beautiful path. In addition to Arres, the relatively new donative Albergue in Canfranc peublo is a standout. Enjoy.
Edited to add: regarding waymarking, I haven't taken the variant to Lumbier (after Sanguesa) that many recommend (next time I will) so I can't comment on the waymarking there.