Disney's the Further Adventures of Aladdin: #4 Iago's Promise — A.R. Plumb

Iago has promised not to say an unkind word about anyone for two days. He'll be rewarded with a brand-new super-deluxe birdbath if he makes it. The trouble is he's overheard the newest members of the palace staff making suspicious plans for the upcoming Ceremony of Fireworks. Iago doesn't want to risk losing his prize, but if he doesn't say something soon, he's afraid the Ceremony might be more explosive than anyone bargained for.