Cult of the Covens (Sleuths of Shadow Salon book 3). Sleuths of Shadow Salon, #3

Cult of the Covens (Sleuths of Shadow Salon Book 3) Can the team untangle a feud between covens, both drug lords of mysterious elixirs before a supernatural war explodes? Celestine is the lead investigator when the team takes on a third case. The elegant and secretive Tavia Floras, known by her coven as the Queen of Savage Flowers creates and manufactures unusual elixirs in her underground caves that promise to heal, even extend life.
She claims a rival coven, Argentum Verde, is stealing her formulas, damaging her crops, poisoning the gators and cave dragons whose tendrils and oils are used in the elixirs, and possibly even "disappearing" coven members. The more Celestine and Luna delve into the queen's backstory, the more questions they have. Rival coven, Argentum Verde's non-GMO, purity claims on their compounds seem suss as well.
The Shadow Salon team enlists the expertise of a halfling geneticist, Dr. Wise, who also knows his way around the supe dark web, Thorned Fortress. Celestine travels to New Orleans to track down Tavia's estranged brother Renzo and find out just what happened to turn him against his sister, Tavia. As Celestine and Luna drill deeper, the case grows incredibly dangerous. A confidential informant turns up dead, dark spells rocket back and forth.
Celestine astral-projects to the heavily-guarded Argentum-Verde warehouse, an act that could paralyze her. Shocking twists and revelations explode, rapid-fire. If Celestine and Luna can't act fast enough, the Queen of Savage Flowers, her coven and business, even Luna and Celestine's Shadow Salon will perish. Cult of the Covens is perfect for fans of Kim Harrison, Kim Richardson, Charlaine Harris and paranormal crime procedurals.
Expect slow-burn romance, pulse-pounding mystery, dark magic, and complex, unique characters. This series can be read in any order because each book features a new case. Around 280 pages.