THE BABY-SITTERS CLUB #13: MARY ANNE'S BAD LUCK MYSTERY is Cynthia's debut graphic novel.

The thirteenth installment of Scholastic Graphix's BSC graphic novel adaptations— 167 pages of comics, with colors by Braden Lamb and Hank Jones. 

Description: 
Mary Anne should never have thrown away that chain letter she got in the mail. Ever since she did, bad things have been happening to everyone in the Baby-sitters Club. With Halloween coming up, Mary Anne's even more worried -- what kind of spooky thing will happen next?

Then Mary Anne finds a new note in her mailbox: Wear this bad-luck charm, it says. OR ELSE. Mary Anne has to follow the note's instructions. But who sent the charm? And why did they send it to Mary Anne?
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The BSC might never see an end to their bad luck if they don't solve this mystery soon!

Available via:
Scholastic
Indiebound
Books A Million
Barnes & Noble
Target

Selected inks:

Take a look at the process of adapting the graphic novel from the original book: