The physical books I wrote, are in dutch and german, but I have translated my book also in english. Interested? Send me a mail and I can send a PDF untill I have the english book "Living on Light & Love" (ISBN 9789403633008) in bookform.
In case you can read dutch, you can check out my bookshop at 'Het Nieuwe Veld'
When you prefer german, check out my bookshop at Das Neue Feld