The Serpent’s Order book tour is through RABT Book Tours and PR and includes a fun author interview. Meet the writer, share, comment, and follow Sarandipity’s for more books and business awesomeness.
Book Details
The Serpent Series, Book 4
Thriller
Date Published: 02-10-2026
Publisher: Oliver-Heber
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.
Author Details
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.
Contact Links
Website: sonyoestavillo.com
Facebook: https://www.facebook.com/sonyozofiaestavillo/
Twitter: https://x.com/szestavillo
Blog: https://www.goodreads.com/author/show/49349032.S_Z_Estavillo/blog
Goodreads: https://www.goodreads.com/book/show/243031711-the-serpent-s-order
Pinterest: https://www.pinterest.com/szestavillo/
Instagram: https://www.instagram.com/szestavillo.author/
BlueSky: https://bsky.app/profile/szestavilloauthor.com
Tell us about your current release
My current release is The Serpent’s Order, the fourth book in the Serpent Series. It
follows two women on opposite sides of the law—a vigilante forced into a covert, off-
the-books operation and a homicide detective uncovering corruption tied to a deadly new
synthetic drug. It’s darker, more political, and more personal than the earlier books, and it
marks a turning point where the series expands beyond individual crimes into systemic
power, control, and consequence.
When did you first realize you wanted to be a writer?
I’ve been writing for as long as I can remember, but I realized I needed to be a writer
much later—after working in film, television, and digital media. Storytelling was always
the constant. Writing fiction became the place where I could fully control the narrative,
explore moral gray areas, and sit with uncomfortable truths without having to sanitize
them.
Have you published any previous books?
Yes. The Serpent’s Order is the fourth book in the Serpent Series, following The
Serpent’s Bridge, The Serpent Woman, and Twilight of the Serpent. The series follows a
continuing narrative, with each book deepening the characters and raising the stakes.
What can we expect to see from you in the future, any books on the backburner?
I’m currently working on Book 5, which dives even deeper into the emotional cost of the
world these characters live in. There are long-term arcs planned well beyond that, including
books that will test loyalties, relationships, and the idea of whether redemption is ever truly
possible. The series is very much alive in my head—nothing here is accidental or standalone.
What do you like to do when you’re not writing?
I’m very grounded in family life—I have two kids, so there’s a lot of real-world chaos
balancing the dark worlds I write about. I also work professionally in digital media and
content strategy, which keeps me creatively sharp in a different way. When I get quiet time, I
love researching—true crime, psychology, systems of power. That curiosity always finds its
way back into the books.
Did you learn anything from writing your book? What was it?
I learned how much patience storytelling actually requires. Writing this series taught me to
trust slow burns, to let characters resist change, and to allow discomfort to sit on the page
without rushing to resolve it. That restraint made the emotional payoffs far stronger.
Some writers have something playing in the background, do you and what?
Yes. I usually write to instrumental or cinematic music—scores rather than songs. Lyrics pull
me out of the scene. Music helps me control pacing and emotional intensity without
dictating it.
Tell us a little about yourself. Perhaps something not many people know about?
I have a background in film and television, which heavily influences how I structure scenes. I
think visually, in beats and cuts, even when I’m writing prose. Also, I’m deeply interested in
moral philosophy—especially how people justify the lines they cross. That’s probably why
my characters are rarely “good” or “bad.”
What do you hope your writing brings to your readers?
I hope it makes them feel seen—especially readers who live in the gray areas. I want my
stories to entertain, yes, but also to linger. To raise questions about justice, power, and
survival without offering easy answers. If a reader finishes a book unsettled but satisfied,
then I’ve done my job.
Purchase Link
Amazon: https://amzn.to/3Ormb3W
Giveaway
5 ebooks
Tour Schedule
February 2 – RABT Book Tours – Kick Off
February 3 – Ella English – Spotlight
February 4 – Boys’ Mom Reads – Excerpt
February 5 – On a Reading Bender – Review
February 6 – Sarandipity’s – Interview
February 8 – Mystic Wonders Journey – Spotlight
February 9 –Book Junkiez – Excerpt
February 10 – Books Blog – Spotlight
February 11 – The Indie Express – Review
February 11 – Crossroad Reviews – Spotlight
February 12 – Always Reading – Interview
February 13 – Books 1987 – Spotlight
February 16- Tea Time and Books – Spotlight
February 17 – Novel News Network – Review
February 18 – The Avid Reader – Interview
February 19 – A Life Through Books – Interview
February 20 – My Bookmarked Reads – Spotlight
February 21 – The Faerie Review – Spotlight
February 23 – Momma and Her Stories – Excerpt
February 24 – Liliyana Shadowlyn – Spotlight
February 25 – Texas Book Nook – Review
February 26 – Nana’s Book Reviews – Spotlight
February 27 – I Love Books and Stuff – Excerpt
February 28 – Book Corner News and Reviews – Spotlight
March 1 – RABT Reviews – Wrap Up
