France 2018

The best book is "All the Aires" , available from www.vicarious-shop.com. It is excellent, but not ALL the Aires are in it.

You can also get Aires books in French from the bigger stores in France, also very good.

Best apps are Park4Night and also Campercontact app, both are very very good.

The ACSI card is also worth having.

Yes, the ACSI scheme is only really an off-peak option.
The French Passion scheme is also good (vineyards/cheese producers/artisans/etc) that we used for the first time this year. No services, just stopovers but very good.
Again available HERE

I don't use books anymore for this purpose Apart from France Passion, you have to buy the guide to use these stopovers for free), since the campercontact app is by far the most complete guide, for France anyway, but I guess for most European countries. Works offline! In addition, the Park4Night app is great for non-official stopovers in France. Remember, In France it is legal to sleep in your MH any place you're allowed to park as long as your stuff stays inside (it's still parking, not camping).
If you do prefer a book, in the huge supermarkets in France you can get Le guide officiel Aires de Services Camping-Car by the FFCC, which lists about 8.500 aires. Do not confuse it with FFCC's Guide Officiel Camping Caravaning, that lists nearly 10.000 campings. Dtill, this guide too can be very handy: it has all camp-sites including the cheap ones (1 and 2 star and small farm-campings)

The best book i use is Camperstop, but as others say now roaming is a lot easier so getting access to the internet a lot better i now tend to use websites ,most covered here but i also find Campercontact the best with up to date reviews, search for sites not far behind then park 4night and BIPA.Be for belgium. The trouble with books is you have to keep updating them, I have an old all the aires France (from when i was adding a few aires and pics for them) a 2013 Bord Atlas for germany and the latest a 2015 Camperstop. Also have the ACSI but have very rarely used it.

Thanks folks.
I had a nose around Google play store and the app for camper contact is called all motorhome parking lite.
However the recent reviews for the app were not great as the version available now is a newer version of the orginal. Most of the comments related to the amount of photos attached to a particular location when searching and these photo are causing the user's internet to crash.
Knowing the level of my tech ability, I have probably looked at the wrong app.
Malcolm

Some misunderstanding, I'm afraid. France Passion is not just another listing of aires. FP is a group of a thew thousand farmers, where you may stay for night as long as you don't need toilets, water and so on. You may stay there for free, as you are a member. Members do receive the above mentioned booklet, where all the farmers (and some other participating spots) are listed.
About Camper Contact: thats a great list of aires, and the app works offline for only 6 euro. You'll find the links to both Apple and Android over here. There's a free version, but that one just includes a few aires, is only for demo purposes.