buono compares new and used prices for 15 books by Simon Monk across European bookshops. The cheapest new one is Making Android Accessories with the IOIO at €6.77; the cheapest second-hand copy is Mouvement, lumière et son avec Arduino et Raspberry Pi at €5.90.
Cheap books UK · Libri usati economici (Italia) · Livres pas chers (France) · Gebrauchte Bücher günstig (Deutschland) · Cheap books Europe
Some links here are affiliate links: if you buy, buono may earn a commission. It never changes the price you pay.