A clonk on the head transports Hank Morgan from the 19th century back to the time of Camelot.
You know about transmigration of souls; do you know about transportation of epochs—and bodies?
Mark Twain, Master Traveller
I first read the original in 7th grade: for me, a vast improvement on Huck Finn. I do see some roots of Robert A. Heinlein (a fellow Master Traveller) in the Connecticut Yankee’s political, economic and social machinations.