buono compares new and used prices for 14 books by Alison Goodman across European bookshops. The cheapest new one is Lady Helen. Vol. 2. Le pacte des mauvais jours at €4.49; the cheapest second-hand copy is Eon at €1.99.
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.