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Although additional paid services are offered, the free test and e-book are written with the intent to be as complete as it can be for a wide range of people. Nothing is left out for sales purposes and neither do you have to leave any details in return. If that works for you all by itself, that is great.


If you like to make a donation you can use one of the buttons below. Or make a direct transfer, of any amount, by using the following details:


Account holder: RR van der Linde

IBAN: NL12RABO0351604081


Description: anything you like (for example your email address, so I can send you a thank you note!)