A new free book, that is printable and also readable as a free PDF has been released.
It is available in a range of languages at https://www.mindheart.co/descargables
The direct link to the English version is https://660919d3-b85b-43c3-a3ad-3de6a9d37099.filesusr.com/ugd/64c685_319c5acf38d34604b537ac9fae37fc80.pdf
Our thanks to the Author and providers.