Divine Ruin

By Margot Douaihy

In the latest in the USA Today bestselling, award-winning, critically acclaimed series, New Orleans punk rock nun-detective Sister Holiday plunges into a "hellish underworld of drug trafficking, addiction, and her own dark past in a journey that is both riveting and sacred." (Ana Reyes, New York Times bestselling author of The House in the Pines)

"Divine Ruin is fearlessly inspired." (Gillian Flynn)

It's a steamy, restless end of the school year in New Orleans. Sister Holiday is finishing her music classes and preparing for her permanent vow ceremony, a pivotal moment in her journey of faith. But when one of her favorite students is found dead of a fentanyl overdose, Sister Holiday and her partner-in-PI, Magnolia Riveaux, are determined to track down the drug dealers. As students continue to fall prey tothis sinister drug, Sister Holiday becomes more desperate to stop the epidemic--while facing her own past with addiction, a demon that is never too far.

With Douaihy's signature mix of grit, heart, and faith, Divine Ruin tests the limits of Sister Holiday's devotion in her darkest and most shocking case yet.

• Format: Hardcover
• Language: English
• ISBN: 1638931984
• ISBN13: 9781638931980
• Release Date: January 2026
• Publisher: Gillian Flynn Books
• Length: 336 Pages
• Weight: 1.21 lbs.
• Dimensions: 1.2" x 6.3" x 9.2"

Customer Reviews

It happens everywhere

Sister Holiday, our favorite tattooed queer punk rock nun detective is back, teaching guitar to highschoolers and just being her bad/good self in NOLA. But then it all goes to perdition when a good solid student of hers dies of an overdose right in front of her and she is unable to make a difference. She and her PI partner, Magnolia Riveaux, are now on a mission to track down the drug dealers. She and her own addiction history are working the case when her nemesis on NOPD taps her for a bit of undercover work with the same goal. It gets pretty dicey, and it is a never ending battle. The nun who has "been there, done that" can and does get right in there and does the best she can while fighting her own demons and praying her way through it all. Hope 2027 will bring us Book 3! Laissez les bons temps rouler! I requested and received a temporary uncorrected review e-proof from Zando Projects | Gillian Flynn Books via NetGalley. Pub Date Jan 13 2026 #preorder ebook, print, audio #DivineRuin by Margot Douaihy @neonmargot #SisterHolidayMysteriesBk3 @thegillianflynn @zandoprojects #NetGalley #LGBTQCrimeFiction #NOLA #opioiddeaths #drugtrafficking #nun #NOPD #undercover #addiction #crimenarrative #testsoffaith #personalloss #grieving