In Mexico City and Oaxaca there are good bookshops. There are no bookshops in Pochutla, Huatulco or Puerto Escondido. Bring your own dictionaries. That depends on your interests and talents and our needs when you are here. It is hard to tell in advance.
Many volunteers help taking care of the six disabled youth and adults that live at the center.
There are work in the kitchen and in the garden as well and in other areas too. Most of the things you need you could buy in Pochutla, half an hour away from Zipolite. Yes that is fine but be a bit careful with bringing dolls with long hair and furry toy animals, they get dirty really quick. You could also go by bus from Mexico City. The terminal of Tasque a in the south of Mexico City.