Mallory knows she's a good baby-sitter. She's been looking after her seven younger brothers and sisters for years. So when Kristy offers her a steady job baby-sitting for the Arnold twins, Mal thinks it'll be easy money.

The twins sure are cute in their matching outfits. But once Mrs. Arnold leaves, Marilyn and Carolyn turn into twin terrors! They trick Mallory so that she can't tell them apart and they act like spoiled brats.

Taking care of Marilyn and Carolyn is a baby-sitting nightmare. But Mallory is a responsible member of the Baby-sitters Club and she's not giving up!

About the Author

Arley Nopra is a Filipina-Canadian illustrator and the creator of the New York Times bestselling Baby-sitters Club graphic novel adaptations of Claudia and the Bad Joke and Mallory and the Trouble with Twins by Ann M. Martin. She was previously a colorist for the second and third Dragon Prince graphic novels. Arley enjoys stories that explore love, resilience, and self-discovery. When she isn’t drawing, she loves getting lost in a good book or spending time with her dog. Arley lives in Toronto.

Ann M. Martin is the creator of The Baby-sitters Club, which has more than 190 million books in print, making it one of the most popular series in the history of publishing. Her novels include A Corner of the Universe (a Newbery Honor Book), Belle Teal, Here Today, A Dog's Life, On Christmas Eve, and the Main Street and Family Tree series, as well as the much-loved collaborations P.S. Longer Letter Later and Snail Mail No More with Paula Danziger. Ann lives in upstate New York.

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