Time Warp Trio

How did Joe, Fred, and Sam end up in King Arthur's court? It all started with The Book, a present from Joe's magician uncle. One minute they were looking at pictures of knights in The Book—and the next minute they are knights, battling fire-breathing dragons and gross-smelling giants! Can the Time Warp Trio escape death and destruction—and make it back to the twentieth century in time for lunch?