"Alan is very scary. He says things like 'I'm big, scary Alan! Fear my razor-sharp teeth!' But all is not as it seems. Alan, you see, has a very BIG (not-so-scary) secret"--Front jacket flap.

The Notebook of Doom is missing and Alexander and his fellow monster-hunters Rip and Nikki are convinced that the boss-monster has it. But is that monster the mysterious Principal Vanderpants--who is certainly behaving oddly--or someone else? They need to figure that out quickly because a mistake could have deadly consequences for Stermont Elementary.

While Ballet Cat and Sparkles the Pony are trying to decide what to play, they each share an important secret.