Book excerpt: Some of the most important authors in British poetry left their mark onliterature before 1600, including Geoffrey Chaucer, Edmund Spenser, and, of course, William Shakespeare. "The Facts On File Companion to British Poetry before 1600"is an encyclopedic guide to British poetry from the beginnings to theyear 1600, featuring approximately 600 entries ranging in length from300 to 2,500 words.