Herblore of the Shire
From Tolkien Gateway
Herblore of the Shire was a book written by Merry Brandybuck, one of several treatises he authored after his return from the War of the Ring.[1]
The book discussed the origins and history of the Hobbits' 'art' of smoking Pipe-weed, tracing it back through Tobold Hornblower (who introduced it to the Shire) to its ultimate origins in Middle-earth, in the lands along the southern banks of the Anduin.[2]