Thanks, dreams, it's worth a try !
Now I'm looking for Spanish authors rather than traductions (like I do with books wrote by anglophone authors, I buy them directly in English rather than their traduction

)
If you read some spanish books when at school, maybe it could do the trick. For exemple, I read "On the Road" by Jack Kerouac, and "Pride and Prejudice", when I was in Terminal, 17 years old, but then I had 5 years learning english as a 2nd language, after French and German (and it was not an easy one, I'd have like to have an ebook version, then, with dictionnary in it

) !