The Curse of Halbizia - Book 2

Then scales...and to my astonishment, an enormous red body which tapered into a huge tail. I was a Red Russian! I let out a whoop of joy which, terrifying, came out as a bellying roar.
 
Simon (12 and dead), is now leading the crazy, ghostly inhabitants of Cadaver College (Sir Syl, the purple Nyred, Gusty). With the help of magic chocolate can he transform into a dragon to save the ghosts and destroy the sea-witch?