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? Full color.
Could Principal Vanderpants be the BOSS-MONSTER?!

Pick a book. Grow a Reader!This series is part of Scholastic's early chapter book line Branches, aimed at newly independent readers. With easy-to-read text, high-interest content, fast-paced plots, and illustrations on every page, these books will boost reading confidence and stamina. Branches books help readers grow!In book 12, the S.S.M.P. needs to track down the boss-monster and get their monster notebook back! Alexander, Rip, and Nikki are keeping their eyes open for clues. Then Alexander spots Principal Vanderpants carrying a white bucket filled with spaghetti through that mysterious locked door on the 13th floor. Why is the principal acting so strangely? Could SHE be the boss-monster?