dutch books about puzzles

If anyone has a similar list about English books I would gladly put it up here in another post.

Puzzles and mathematics are about solving problems without fighting. Using your brain instead argument. That's the drive behind my passion for puzzles. It's affection.

One of my favorite puzzles for children is how to clean up a broken egg on the floor. It's a puzzle that you cannot solve with only one manner. The best strategy is using many layers.
A piece of paper might take care of the shells, a wet cloth might take care of the egg itself, and to really clean the floor you would use some soapy water.
This makes 3 layers of solution.

Unfortunately the following books cannot be bought new at this moment:

1. De fis van Euler; Jan van de Craats; Aramith Uitgevers; ISBN 9068340514.
2. Woordenboek van merkwaardige en interessante meetkunde; David Wells; Bert Bakker; ISBN 9035112016
3. Merkwaardige en interessante puzzels; David Wells; Bert Bakker; ISBN 9035114035
4. Mysterieuze & fascinerende raadsels; de opwindendste hersenkrakers uit de wiskunde; Bert Bakker; ISBN