Nova and her nanas are witches-- three of the few (only??) in their community. When Tam, an old friend (who is a werewolf), returns to town, she and Nova team up to defeat a cult that has summoned a demon. The nanas, in their wisdom and experience, help, too.
Mooncakes is a super cute graphic novel featuring a queer love story, witch-y magic, and the classic must-defeat-the-bad-guy. Unlike many other stories that feature witches and magic, Nova's human friend Tat is aware of magic and Nova's abilities and loves to try to rectify science with magic. AND she helps (a little) in the battle. Additionally, it's not werewolves vs. witches, but Tam working with the witches to defeat the antagonist.
The illustrations reminded me of the style of The Prince and the Dressmaker: realistic, colorful, and non-experimental.
I'm not usually much of one for graphic novels, but I enjoyed Mooncakes.
Written for teen readers, but it is appropriate for tweens, too.