Lots of ebooks

Lots of ebooks on Social Networks and related stuff (Digital) - both in PT & EN:

http://www.blogmidia8.com/p/biblioteca-virtual.html

ÚTIL:
http://br.wwwhatsnew.com/2011/10/transforma-comprime-mistura-e-muda-o-tamanho-de-arquivos-pdf/


http://www.pdfescape.com/