Grooks by Piet Hein. Published by The MIT Press, 1996. First English language edition. A grook (Danish: gruk) is a form of short aphoristic poem or rhyming aphorism, created by the Danish poet, designer, inventor and scientist Piet Hein, who wrote over 10,000 of them, mostly in Danish. They have been published in Danish in 20 volumes. (Wikipedia) Grooks, Piet Hein, poetry book, vintage book, collectible book, collectibles, library accessories, home library, Danish poetry, Danish book, 10