Text: Renata Piątkowska

Illustrations: Joanna Kłos



144 pages


16,5 x 22 cm





Children have always loved enigmas. They are not afraid of the thrill of emotions that shivers down their spine. These are exactly the feelings that you can expect reading this series! yOu can’t stop reading, you must find out how the investigation will end! So you read with a flushed face, analyze, combine facts, draw conclusions, and have a lot of fun!

It’s time to put your eye on the keyhole and see what’s going on on the other side.