Phillip and Whizzy (Book 3): Last Emerald

Phillip Harper and Michael "Whizzy, Whizzenmog need to return to Mistasia in order to save Grace Tallon and stop King Cragon Cadieux who once again rules Mistasia. In order to return, they must convince, Rachel and Whizzy's grandfather, Rainer Whizzenmog to help them with the use of a mystical green emerald. Their travels through Mistasia will be more dangerous than ever before, as King Cragon and his heinous sorcerer, Pierre LaCroiux will stop at nothing to keep them from reaching the cast...