text & illustrations: Sieb Posthuma, Gecko Press, NEW ZEALAND, 2014

text & illustrations: Sieb Posthuma, Boje, Germany, 2008

text & illustrations: Sieb Posthuma, JAPAN, 2015

author: Annie M.G. Schmidt, translator: David Colmer, illustrations: Sieb Posthuma, Eerdmans Publishing Co, USA, 2000

Booktrailer

text & illustrations: Sieb Posthuma, Publishing House of Electronics Industry, CHINA, 2014

text & illustrations: Sieb Posthuma, Turbine, DENMARK, 2012

text & illustrations: Sieb Posthuma, Seemann E.A., GERMANY, 2015

text & illustrations: Sieb Posthuma, Editura 34, BRASIL, 2015

text & illustrations: Sieb Posthuma, © éditions Sarbacane, Paris, FRANCE, 2013

text & illustrations: Sieb Posthuma, White Star Kids, ITALY, 2016

text: Joukje Akveld, illustrations: Sieb Posthuma, Turbine, DENMARK, 2014

text: Joukje Akveld, illustrations: Sieb Posthuma, Urachhaus, GERMANY, 2014