The Magnet detective book 3
By: Wolfgang Ecke ; illustrated by Rolf Rettich ; translated from the German by Stella and Vernon Humphries.
Contributors: Rettich, Rolf.
Publisher: Magnet
Published: 1981
Place of publication: London
Language: eng
Number of pages: 125
Work titles: The case of the invisible witness
Notes: Originally published as 'The case of the invisible witness', London: Methuen, 1980.