"Fangbone and his friends are full of project ideas for Eastwood Elementary's 'Invention Convention'. Unfortunately, the evil Venomous Drool has ideas of his own, like sending a horrible creature to crush Fangbone! But when a misdirected spell at a birthday party sends the terrifying monster to attack Bill instead, Fangbone must invent a way to save his best friend--and fast!"--P. [4] of cover.