This is my 2nd year studying in Madrid and through my studies I've acquired many novels and textbooks, in English and in Spanish. There are a few that I know I will most likely never touch again...

I'm looking to get rid of a few and I was wondering if anyone knows of any used book stores in Madrid that are open to buying/accepting used textbooks and/or novels, in English and in Spanish?

Thank you all so much!
Un saludo