These translated stories are taken from 'Jip en Janneke, eerste boek' and 'Jip en Janneke, tweede boek', published in Holland by Uitgeverij De Arbeiderspers in 1963 and 1964.
Bob and Jilly are friends by Annie M. G. Schmidt. ISBN 0416551106. Published by Methuen in 1977. Publication and catalogue information, links to buy online and reader comments.