The world of Seth Thistlethwaite is full of adventure that makes his everyday routine anything but. Dreary, dark, dank castles. Biting bushes of bumbleberries. And a saber-toothed . . . sloth? Seth is no ordinary kid -- he is SIR Seth Thistlethwaite, and along with his best buddy, Sir Ollie Everghettz, he leads The Mighty Knights of Right and Honor. Together, they embark on adventures high and low, to and fro, day and night, or at least as long as weekends, curfews, and supper time will allow. In the self-created world of Thatchwych, they are gallant adventurers up to any task. But can these errant young knights contend with the scheming Prince Quincy Poxley and collar his latest theft -- the Soothsayer's Shoes? Will Seth, Ollie, and their horse (who's really a dog named Shasta) be able to resist the dangers of dog-eating bog frogs, fire-breathing bats, elephant ants, and invisible voices to save the day?