De vergeten vissers van MiddelharnisRinus van Dam, Marlies Jongejan, Pieter Koster · First published 2018Open the Tome
English Made Easy Vol. 2Jonathan Crichton, Pieter Koster · First published 2013 · Latest edition 2016Open the Tome
Learning English Through PicturesJonathan Crichton, Pieter Koster · First published 2013Open the Tome
The Adventures of Tom Sawyer (adaptation)Pieter Koster, Mark Twain · First published 2011Open the Tome
