Which book is that? Which of his can you still recommend?
I also googled him and his books, lectures, etc. right away yesterday and will deal more intensively with his suggestions. @Wilder Sueden: Thanks for the recommendation. :)
The books are not exactly cheap but definitely worth a lot if you have a passion for nature.
This, on the other hand, I would call an understatement. ;-) Yesterday, while researching, I first stumbled upon "Der Naturgarten ...
Used - Hardcover Condition: good EUR 118.90 ...", but there are cheaper alternatives by him. :)
The book "Nature for Every Garden" has appeared in four editions so far. Can you particularly recommend one or from which edition is your book? (I ask because the latest edition of books, except for scientific works, is not always better than previous editions.) And no, I don’t want to find out how old you are with this question? ;-)