Zeus.
Fertz Meister
Try this link zeus, it worked for me.
Just follow the email link to order.
Aquarium Plants « Christel Kasselmann
The English Edition is published ! Only available via this website. 69,95 € (4,- Euro shipping costs within EU, all other countries 10,- €). Order your dedicated copy. Please write to me Translation from the German Edition 2019 by Christel Kasselmann. Aquarium Plants Publisher, 2020. ISBN...www.christel-kasselmann.de
Emails link never work straight off me me, so just copied email address and sent one - cheers m8