"The Anatomy of Melancholy" by Robert Burton is a medical treatise first published in 1621. This massive work explores depression and its causes, symptoms, and cures, but ranges far beyond medicine into history, astronomy, geography, and literature. Written under the pseudonym Democritus Junior, Burton blends scientific analysis with humor and satire across over 500,000 words. Drawing from ancient authorities and medieval sources, he examines melancholy as both a passing mood and a serious ailment, creating a unique work that inspired generations of writers.