The Famous Five and the Strange Scientist
Book 14 of 18 in this category 
Book Details...
First edition: 1985
Publisher: Knight Books
Illustrator: Bob Harvey
Category: Famous Five Sequels
Genre: Mystery/Adventure
Type: Continuation Books
Publisher: Knight Books
Illustrator: Bob Harvey
Category: Famous Five Sequels
Genre: Mystery/Adventure
Type: Continuation Books
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Reprints
Originally published in 1980 by Librairie Hachette as Les Cinq Jouent Serré
Author: Claude Voilier
Translated by Anthea Bell
ISBN-10: 0340368101
ISBN-13: 978-0340368107
Brief Summary: Despite his reputation for eccentricity the behaviour of the brilliant scientist staying at Kirrin Cottage puzzles the Five. Is he an impostor? And if so, where is the real professor? The Five's suspicions lead them into an unexpected encounter with an international spy-ring and a thrilling adventure on their own doorstep.