Artie if you are looking for 2nd hand books there is only two places I know in Paris:
>> La machine volante, 75 r Claude Decaen, 75012 PARIS
railway station is "Daumesnil", phone: 01 43 40 91 07
open wensday & thursday: 14h-18h
Friday 11h-19h & saturday: 11h-18h
> second one is 'Le carreres aviation' but i think it's close now
>>>>>>>>> if you are here you need to go to "la ferté-alais" air show with many warbirds see there:
http://www.ajbs.fr/ the annual airshow is this week-end :-)
(La ferté-alais, aérodrome de cerny is around 60-70 km south of Paris )
cheers