There are 4 books in the The Casquette Girls series. The newest book is The Gates of Guinée which came out in 2021.

1
The Casquette Girls

Book cover of The Casquette Girls
After the storm of the century rips apart New Orleans, sixteen-year-old Adele Le Moyne and her father are among the first to return. Adele wants nothing more than to resume her normal life, but with the silent city resembling a war zone, a parish-wide curfew, and mysterious new faces lurking…
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2
The Romeo Catchers

Book cover of The Romeo Catchers
"Adele's supernatural roller-coaster ride continues at breakneck speed." -RT Book Reviews

Tormented by the fate she condemned her mother to, and by the lies she's forced to tell to cover it up, Adele scours Storm-ravaged New Orleans for the truth about her family's magical past. But every turn leads her…

3
The Cities of Dead

Book cover of The Cities of Dead
The Cities of Dead: the highly anticipated third book in Alys Arden’s spellbinding The Casquette Girls series.Old World witches collide with the French Quarter’s strangest denizens, setting off events that could tear the fabric of the Natural and Supernatural worlds, and only the most elusive, mischievous Voodoo lwa hold the…

4
The Gates of Guinée

Book cover of The Gates of Guinée
Hailed as “the Anne Rice of the text message generation,” Alys Arden’s sparkling debut, The Casquette Girls, entranced over a million readers online, and the series has since garnered a cult following around the world.“A Southern Gothic love letter.” —Publishers Weekly, Starred Review, on The Casquette Girls“Beautiful yet sinister.” —Gothic…