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Book Details
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!
Book Links:
Amazon: https://amzn.to/4jYmTBu
Bookbub: https://www.bookbub.com/books/the-serpent-s-order-the-serpent-series-book-4-
by-sz-estavillo
Goodreads: https://www.goodreads.com/book/show/243031711-the-serpent-s-order
Book Details
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.
Book Links:
Amazon: https://amzn.to/4jWGKRu
Bookbub: https://www.bookbub.com/books/twilight-of-the-serpent-the-serpent-series-
book-3-by-s-z-estavillo
Goodreads: https://www.goodreads.com/book/show/228873572-twilight-of-the-serpent
Book Details
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.
Book Links:
Amazon: https://www.amazon.com/dp/B0D48BXRHF
Bookbub: https://www.bookbub.com/books/the-serpent-woman-by-sz-estavillo
Goodreads: https://www.goodreads.com/book/show/213467029-the-serpent-woman
Book Details
The Serpent’s Bridge
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?
Book Links:
Amazon: https://amzn.to/4rA77Q7
Bookbub: https://www.bookbub.com/books/the-serpent-s-bridge-the-serpent-series-book-
1-by-sz-estavillo
Goodreads: https://www.goodreads.com/book/show/211287711-the-serpent-s-bridge
Book Trailer:
Get the Box set duo for Only $2.99 for a limited time!
Get it on Amazon!
https://amzn.to/4rA8ka7
About the Author
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.
Author Links
Website: https://sonyoestavillo.com/
Facebook: https://www.facebook.com/sonyozofiaestavillo/
X: https://x.com/szestavillo
Instagram: https://www.instagram.com/szestavillo.author/
Bluesky: https://bsky.app/profile/szestavilloauthor.com
TikTok: https://www.tiktok.com/@szestavillo.author
Bookbub: https://www.bookbub.com/authors/sz-estavillo
Amazon: https://www.amazon.com/stores/S.Z.-Estavillo/author/B0D1NMYNBC
Goodreads: https://www.goodreads.com/author/show/49349032.S_Z_Estavillo
Giveaway
$20 Amazon or Paypal
Follow the tour HERE for special content and a giveaway!
Tour Schedule
Jan 20
Kickoff at Silver Dagger Book Tours
Books1987
Anna del C. Dye official page
Bedazzled By Books
Jan 21
Jody’s Bookish Haven
Wibell’s Worlds
A Writer’s Life
The Avid Reader – REVIEW ALL
Jan 22
Nina Soden #TheRedheadedAuthor
Guatemala Paula Loves to Read
Sarcastically Yours, Jen
Jan 23
Angel’s Book Nook
Dawn’s Reading Nook
☼ A Place In The Spotlight ☼ with M.C.V. EGAN
Jan 24
Tina Donahue Books – Heat with Heart
Book Bites….with a side of coffee
Jan 25
Books+Coffee=Happiness
The Book Junkie Reads . . .
Jan 26
Sarandipity’s
Chapters Through Life
Romance Novel Giveaways
Jan 27
FUONLYKNEW
Sandra’s Book Club
Books all things paranormal and romance
Jan 28
M.C.V. EGAN ❧Defining Ways❧
C.A.Milson
Word Processor, Romance, Cats, Kids and Creed
Jan 29
Author Sahara Foley
Insane Books
Webs and Blogs For Writers
Jan 30
Country Mamas With Kids
Inside the Insanity
Book Reviews by the Reluctant Retiree
Jan 31
Craving Lovely Books
Feb 1
Trixie Reports Books
Feb 2
Sharon Buchbinder Blog Spot
My beauty my books
Karen J. Mossman – World of Stories
Feb 3
Stormy Nights, Books and Blogging
Royally Insane Books
Feb 4
ⒾⓃⓉⓇⓄⓈⓅⒺⒸⓉⒾⓋⒺ ⓅⓇⒺⓈⓈ ASTROLOGY
The Scratching Post
Feb 5
Maggie Blackbird – REVIEW #1
Twisted Book Ramblings
Feb 6
WMC Book Corner – YouTube channel
The Bookshelf Fairy
Feb 7
Scrupulous Dreams
Feb 8
The Book Dragon
Feb 9
Because I said so – adventurers in parenting – REVIEW ALL
Painting With Words
Feb 10
Midnight Book Reader
Queen of Randomness
