Gareth's definitely not an ordinary cat. For one thing, he can talk. For another, he's got the power to travel through time. And the instant he tells this to Jason, the two of them are in ancient Egypt, on the first of nine amazing adventures that Jason will never forget!
Lloyd Chudley Alexander (1924–2007) was a widely-influential American author of more than forty books, mostly fantasy novels for children and adolescents, as well as several adult books. His most famous contribution to the field of children's literature is the fantasy series The Chronicles of Prydain. The concluding book of the series, The High King, was awarded the Newbery Medal in 1969.
Map of Prydain. (PDF)