Yes, definitley!
We've used the Cool Camping France book for the past two summers and managed to find a few excellent campsites. We were hoping to go down to Bilbao and northern Spain this year hence the book ... but after reading flicking through it on Christmas day we're now thinking perhaps northern Italy and Switzerland ..! Guaranteed to give you wanderlust!
The only negative is a few of the sites in the book don't allow vehicles on site - which makes life a bit difficult in a bus!