well, i don't spend much time on goodreads, so y'all probably have already discovered this brilliant feature, but i thought i'd mention it just in case :
goodreads is associated with our very own hadrien's feedbooks site, so if you find a book on goodreads which is available on feedbooks you can download it right away from within goodreads !!! brilliant idea !
i found out when i added the book i'm currently reading, Monsieur Lecoq by émile gaboriau, which as it happened i got on feedbooks.