By easy I mean you can find find then in shops (or website) actually located in France. So no import, higher delivery cost and all).
There is also the fnacbook in term of cheaper, but it's not the same quality.
Surcouf have the pocketbooks too i think. (But their website seams to be off, so i can't check.)
Ah, pixmania have a few e-readers.
http://www.pixmania.com/fr/fr/Ebook/...mp2786_cm.html