J. R. R. Tolkien
The request for a sequel prompted Tolkien to begin what would become his most famous work: the epic novel "The Lord of the Rings" (originally published in three volumes 1954–1955). Tolkien spent more than ten years writing the primary narrative and appendices for "The Lord of the Rings", during which time he received the constant support of the Inklings, in particular his closest friend C. S. Lewis, the author of "The Chronicles of Narnia". Both "The Hobbit" and "The Lord of the Rings" are set against the background of "The Silmarillion", but in a time long after it.
Warwick
J. R. R. Tolkien seems to have been very influenced by Warwick (where he was married in the Catholic Church of Saint Mary Immaculate) and by its Mercian connections: Lynn Forest-Hill, in an article in the "Times Literary Supplement" (TLS 8 July 2005 pp 12–13) argues cogently that two important settlements in Tolkien's work were modelled on Warwick — Edoras closely on the early town, and Minas Tirith more remotely on the Norman; and that aspects of the plot of "The Lord of the Rings" are paralleled in the romance known as Guy of Warwick. Christopher Tolkien, in "The Book of Lost Tales", stated that Kortirion, the main city of Tol Eressëa, "would become in after days Warwick."