Das große Buch der Heinzelmännchen

Blurb

Gnomes is a 1977 book, one in a series of books, written by Wil Huygen and illustrated by Rien Poortvliet. The book is a mockumentary which explains the life and habitat of gnomes, much like a biology book would do, complete with illustrations and text book notes.
The 1980 film Gnomes, and the series David the Gnome and Wisdom of the Gnomes are based on this book.
The book was followed by:
The Secret Book of Gnomes by Huygen and Poortvliet
The Complete Gnomes by Huygen and Poortvliet
Gnome Life by Huygen
A Gnome's Christmas by Poortvliet