> Literature from before 1800, Davis notes, is ‘mostly unread, even by writers’
I strongly disagree. There are many counterexamples, some authors are still widely read. Besides Shakespeare, it's Defoe, his Robinson Crusoe is one of defining books for me, later I also enjoyed Journal of the Plague Year and Moll Flanders. Swift's Gulliver's Travels is in top ten list all of the books I ever read.