Camperstop has selected aires for all countries in Europe ( I have 2019), £25 - worth the money.
WHY not embolden technology?
I am very much anti tech as I like resolving things in a personal way.
As you use the forum it is obvious you can use technology so curious why only books.
So for a resume of how I function, I use:
Old traditional maps for France and Spain, current versions are Michelin 1995 and 1998,
Old 2012 AA Europe map that has routes we have taken marked on it along with other peoples suggestions for ALL of Europe.
A Philips Road Map 2020 (do not like it as weak accuracy and only selected roads, but does have All Europe small scale and large scale.)
WILDCAMPING app which replaced download onto Old hand me down Satnav (2008 era map).
A satnav if I remember to take it- not on this trip.
previously A tablet (now replaced by phone) to use Maps.me as I can enter co-ordinates in and review locations.
And finally - good old common sense, eyes and detective work to find locations.