Kernowland 1 The Crystal Pool is the first book in the Kernowland in Erthwurld series by Jack Trelawny. Tizzie and Louis are on holiday in Cornwall when they enter Echo Cave and are transported through the Crystal Pool to the amazing and mysterious Kingdom of Kernowland in Erthwurld. Kidnapped by the nasty Melanchol Drym to be sold as slaves to Cap'n Pigleg and his pirates, they are soon separated in a slave auction at the Polperro Inn. Their plight looks hopeless. Until Louis is helped by the kindly Mr Sand. Now, before he can go home, the young boy has to rescue his sister. Will he be able to find and rescue Tizzie before she is sold on by the pirates and lost forever in Erthwurld?