Meet Babymouse--the spunky mouse beloved by young readers for more than a decade! Halloween is here and Babymouse wants to have the best costume party ever! What spooky surprises could be in store? This groundbreaking young graphic novel series, full of humor and fun, is a bestseller that's sold more than three million copies!

"Move over, Superman, here comes Babymouse!"-The Chicago Sun-Times

It was a dark and scary Halloween. . . . This year, Babymouse is determined to have the best Halloween costume and the best Halloween party ever. Will Babymouse be the monster of her dreams? Will Felicia Furrypaws come to the party? And is that really the creature from the black lagoon living in Babymouse's locker? Find out in Monster Mash-the 9th hilarious, action-packed installment of the beloved Babymouse graphic novel series!

DON'T MISS The BIG Adventures of Babymouse: Once Upon a Messy Whisker, the newest, brightest, and BIGGER THAN EVER graphic novel from BABYMOUSE!

Illustrated by: Jennifer L. Holm, Matthew Holm