This is the smaller sized PB from when they first published, same size as the lovely old style HBs with old covers so size wise helps you maintain a set...
Author: Delaney, Joseph, Binding: Paperback, Imprint: Red Fox, Series: The Wardstone Chronicles, Publisher: Random House Children's Publishers UK, Published: 26/04/2012, Pagination: 384 pages, Classification: Children's, young adult & educational, Country of Publication: United Kingdom