Sneeze of the Octo-Schnozz: A Branches Book (the Notebook of Doom #11)

Everything stinks! Alexander, Rip, and Nikki aren't in the same class anymore. The monster notebook is missing. And a honking monster is SLIMING Stermont! Plus, actual smelly stuff is going missing all over town. Could all these stinky things be connected? The S.S.M.P. will have to sniff out this monster!