All of the stories in The Sketchbook of Geoffrey Crayon (including "The Legend of Sleepy Hollow," which has a Gradesaver guide of its own) can be compared and contrasted and generally discussed in relation to one another. Related authors who write on similar themes include the following:
Ralph Waldo Emerson (poems)
Nathaniel Hawthorne ("Young Goodman Brown")
Henry Wadsworth Longfellow (essays and poems)
Edgar Allen Poe ("Annabel Lee")
Walt Whitman (essays and poems)
Also consider Washington Irving's other stories of fantasy and travel: The Alhambra, Tales of a Traveler, Old Christmas, Bracebridge Hall.