WHERE TO START

Two Heroines. Two Series. One Dangerous World.

Thrillers by I. C. Cosmos

Each thriller can be enjoyed on its own, and each series has its own central heroine. Yet Alex Demarchelier and Helen Dillon inhabit the same dangerous world—one filled with old grudges, shifting alliances, criminal masterminds, and characters who refuse to stay in the background.

For readers who enjoy watching connections deepen, villains evolve, and supporting characters step into the spotlight, the chronological order is the best way to follow the complete story. Otherwise, jump to themes & heroines

The Chronological Reading Order

Alex Demarchelier Series, Book 1

This is where it all begins.

The Wall introduces Alex Demarchelier and Vivien, two formidable women whose bitter conflict will reverberate through the books that follow. Perry and Collin appear in supporting roles—but neither will remain on the sidelines forever.

Helen Dillon Series, Book 1

The focus shifts to Helen Dillon and her dangerous conflict with Andreas Gershwiller, the criminal mastermind uncle who has haunted her life.

Collin enters the story somewhat later, but his importance steadily grows. The events of The Project begin after The Wall, expanding the world beyond Alex and Vivien’s feud and revealing a much larger web of manipulation.

Alex Demarchelier Series, Book 2

Alex and Vivien’s feud escalates—and this time, Andreas turns his attention to Alex.

Helen plays a major supporting role, while Perry and Collin remain the kind of allies every thriller heroine needs: loyal, resourceful, and willing to step into danger. The Deal begins after The Project, bringing the two series together.

Alex Demarchelier Series, Book 3

Vivien reinvents herself and returns with renewed ambition, fresh weapons, and no intention of leaving Alex or Perry in peace.

Andreas is delighted by what she has become. Helen and Collin, meanwhile, have their hands full trying to contain threats that are growing more sophisticated—and far more dangerous.

Alex Demarchelier Series, Book 4

Enter Morgan Steel: a fiercely ambitious Washington, D.C., lawyer willing to defend Vivien when no one else will.

While Morgan pursues the case that could make her career, Alex faces legal trouble of her own. Perry, Helen, and Collin rally around her—but loyalty may not be enough when the law itself becomes a weapon.

The story follows the events set in motion in The Code and deepens the consequences of what came before.

Helen Dillon Series, Book 2

Kate—also known as Caitlin—has been part of this world longer than readers may realize.

She first appears in a minor role during the events of The Wall, and the incident that ultimately changes her life occurs in The Deal. Most of The Curator, however, takes place after The Enabler and tells a largely self-contained story.

When Kate is pulled into danger, Helen steps in to help—and Collin is there to support them both.

Helen Dillon Series, Book 3

Nemesis brings the intertwined timeline to its latest and most explosive point yet.

The story has two central heroines: Nora Alden, a freelance journalist pushed beyond every limit she thought she had, and Helen Dillon, who understands better than anyone what Andreas is capable of.

Together, they set out to return him to the prison.

But taking down a criminal mastermind is never as simple as exposing the truth—and by now, Andreas has had years to perfect the art of controlling everyone around him.

Nemesis takes place after all the previous books.


Themes & Heroines

My thrillers move in and out of various worlds—design, technology, art, AI, politics, or law, for instance—but these worlds are merely the backdrop for the drama. The deeper issues recurring across the stories are power, manipulation, and the choices that reveal character.

Still, how do you decide where to start? Here are a few tips.

If you like stories involving:

Choose The Wall if you like strong female protagonists, chillingly believable villains, international settings, and personal suspense that escalates into political and technological intrigue. It is also the best place to start if you want to read the Alex Demarchelier Series in order.

Start with The Curator if you like resilient female protagonists, museum and gallery settings, art fraud, financial crimes, and psychological suspense centered on the fragile line between reinvention and exposure.

The Enabler is for you if you like ambitious female protagonists, toxic clients, White House intrigue, and suspense about how intelligent people rationalize one compromise after another.

You’ll enjoy The Project if you like intriguing female protagonists, undercover identities, reluctant partners, and thrillers that ask where protection ends and control begins. It’s the first book in the Helen Dillon series.

Read The Deal if you like strong female protagonists, formidable villains, political families with buried secrets, and suspense in which the most protected household in America may already be compromised.

Start with The Code if you like formidable female protagonists, deepfakes, disinformation, cyberattacks, corrupt insiders, and psychological suspense about what happens when no one knows which version of reality to believe.

Nemesis is for you if you’d enjoy reading about a freelance journalist who infiltrates a president’s private resort—and becomes the most dangerous witness in America when he turns up dead


Meet the author

I love storytelling and exploring what people do when life pushes them to the edge.

My fascination with why some people crumble under pressure, others become villains, and some rise to become their best selves found its way into all my books. I hope you’ll enjoy the characters' journeys through fear, conscience, and the darker corners of the human psyche.

My husband and I live in Baltimore.