Viola Naust-Schulz Logli crime stories » The Mysterious Evidence (4th Grade) « Illustrated by Peter Pfeiffer 9+, June 2007 32 pages, 21.0 x 29.7 cm ISBN 978-3-7855-5013-7 exercise book 4,95 € (D) Rights sold: Chinese

- One continuing case
- Math exercises lead the child closer to the solution of the case
- Training in maths, reading, and advancement in concentration all in one!
- Control of the solution with the help of flap-out detective page