The books are a good general guide but the problem with them is that the Aire information can be out of date.
The publication of the books is annually but the information has been collected well in advance and many Aires in the books have not been inspected or checked for years.
So some Aire info can be years out of date and inaccurate.
Aires on the Apps such as Campercontact are updated and reviewed almost daily in some cases and is rarely wrong or inaccurate.
During last year many Aires have been fitted with barriers and pay machines, some have closed, others been renovated, prices have changed and this information is soon added to the Apps but the books remain a long way behind in correct info.
We bought 'All the Aires' the first year we went to France and found two Aires closed, one for a very long time, and although it was no big deal it wasn't very helpful to pay out on a book that was well out of date.