buono compares new and used prices for 9 books by Emma Marriott across European bookshops. The cheapest new one is I Used to Know That: History at £7.19; the cheapest second-hand copy is I Used to Know That: History at €2.20.
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.