crikey !
and i thought books were expensive here (france). a new book in large-sized paper back (called "broché" meaning it's sewn now glued, but still not hardcover ; most new books are first published in this format) costs usually around 20€. second-printing pocket edition paperback books are usually around 7€ or more which is a bit more reasonable (although still high, i think). ebooks are so far wildly varying, with most of them being closer to broché prices than pocket, with a few (public domain, usually, or small / independent authors and publishers) exceptions.