Every crime tells a story…
But not every killer is the villain.
The Serpent’s Order
The Serpent Series Book 4
by S.Z. Estavillo
Genre: Thriller, Romantic Suspense
An assassin bound by
obedience. A detective marked for death. A cartel war with no survivors.
Von Schlange thought she’d escaped her past. Now Black Nova owns her—an elite,
off-the-books task force where obedience is survival and failure means death.
As their newest assassin, she’s unleashed on targets tied to Jaxon Ryker, a
drug lord buried deep in the Alaskan wilds.
Her partner, Xander Holt, a former Navy SEAL with ice in his veins, lives by
the same brutal code: no attachments, no lines crossed. But as missions turn
bloody, the fragile boundary between partner and lover begins to blur—and desire
becomes its own kind of danger.
Across the country, Detective Anaya Nazario faces a nightmare of her own. A
synthetic “zombie drug,” deadlier than fentanyl and immune to Narcan, is
ripping through Los Angeles. Her investigation exposes a network of dirty cops
shielding Ryker’s empire—and puts a target squarely on her back.
Two women on opposite fronts. One war against corruption and cartel power. And
a single truth—every betrayal leaves a body behind.
Explosive, unrelenting, and razor-sharp, The Serpent’s Order propels the
Serpent Series into its most dangerous chapter yet—where justice is a myth, and
survival comes at a price paid in blood.
**NEW RELEASE on Feb 10, 2026! PreOrder Now!**
Twilight of the
Serpent
The Serpent Series Book 3
Some predators hide
in plain sight. Others hunt from the shadows.
Merrick Winslow is a decorated Army officer, a man of discipline and honor—or
so he claims. When he reports that his ex-wife, Cheonsa Soo-Min, has been
stalking him, no one questions his story. He paints her as unstable, vengeful,
and dangerous, a woman consumed by obsession. But when two officers are gunned
down with her own weapon, the truth becomes harder to see. With the law closing
in, Cheonsa vanishes, fleeing to Rio de Janeiro, where she is taken in by Von
Schlange, the vigilante thought to have disappeared for good.
Von has retired her vengeful ways, leaving behind a life of bloodshed to run a
quiet veterinary clinic. But when Cheonsa’s past collides with Winslow’s lies,
the two women begin to unravel a deadly deception—one that turns predator into
prey. By the time Von uncovers the truth, an innocent life has already been
taken.
Now, there’s only one thing left to do: find the real monster and make him pay.
Meanwhile, in Los Angeles, Detective Anaya Nazario and Supervising Special
Agent Blake Huxley are adjusting to life as new parents. But after only four
months of maternity leave, Nazario is pulled back into the field to investigate
the murder of two officers. What should be a straightforward case quickly
spirals into something far more sinister—secrets buried beneath the badge, a
killer hiding behind a uniform, and a web of corruption stretching further than
anyone expected.
As Nazario and Huxley chase down leads, their investigation intersects with a
vigilante they once thought was dead. And this time, Von Schlange isn’t just
seeking justice—she’s delivering retribution.
For fans of Karin Slaughter, Gillian Flynn, and Taylor Adams, Twilight of
the Serpent delivers a high-stakes vigilante thriller packed with morally gray
justice, relentless suspense, and a tangled web of deception. Perfect for
readers who love strong female leads, intense cat-and-mouse chases, and dark
psychological twists.
The Serpent Woman
The Serpent Series Book 2
The exciting sequel to The Serpent's Bridge...
A serial killer is on the loose. With her insidious tattoo and venomous killer
strike, they’re calling her the serpent woman.
Two of the best in their field, LAPD Detective Anaya Nazario and FBI
Supervising Special Agent Blake Huxley are forced to work together yet again,
despite their strained romantic history and a baby on the way. Together on a
nationwide hunt, they must find this serpent woman before she strikes again.
But, as the cat-and-mouse chase evolves, Nazario and Huxley begin to realize
that their killer is on a mission of vigilante justice and they must struggle
with the question of who really deserves their justice: The killer, or her
victims?
This dark thriller delves into the sensitive topics of sex trafficking,
child abuse, animal death, sexual assault, graphic violence, and dead bodies.
Reader discretion is advised.
The Serpent Series Book 1
Compelling
dialogue, rich, gritty prose, and characters you won’t forget — if you loved
The Girl Who Kicked the Hornets Nest by Stieg Larsson, or Ink and Bone by Lisa
Unger, you’ll love The Serpent’s Bridge.
Recovering alcoholic Detective Anaya Nazario remains haunted by her father's
murder. Lucas Nazario was the highest-ranking Puerto Rican LAPD detective, and
his case has gone unsolved for twenty-four years since his murder. When Mexican
immigrants are targeted by a serial killer, Nazario senses a connection and
fights to keep the leadless case open. The homicide investigation centers on
Sanctuary Baptist, a church composed of immigrants led by Pastor Stan and his
wife. Nazario's personal and professional worlds collide when she is compelled
to collaborate with her former lover, Special Agent Blake Huxley. As their
lives merge once more, the FBI and Detective Nazario stop at nothing to find a
killer.
Is this the same monster who killed her father and left him for dead under a
bridge?
Can she put a stop to the murders before more families lose loved ones?
Get the Box set duo for Only $2.99 for a limited time!
As a BIPOC thriller author, she previously parted amicably
with her agent and, three months later, secured an eight-book deal with
Oliver-Heber Books—now boasting 24,000 downloads in its first year and a
BookRaid bestseller ranking in the thriller category. The Serpent Woman (Book
2) reached #1 on Amazon and topped all three of its categories. Her background
spans literary agencies and TV studios, where she contributed to greenlit
screenplays that became Lifetime movies. She holds a Master’s in Television,
Radio, and Film, has taught author branding workshops (L.A. Writer’s
Conference, North Texas RWA), and maintains a 100K+ social media following.
Website * Facebook * X * Instagram * Bluesky * TikTok * Bookbub * Amazon
* Goodreads
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