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The Last Immunity #4
By Her Own Hand
The outbreak has a name now. So does the woman they need to stop it.
Mara Hale has spent her life being studied, contained, hunted, and renamed by people who believed her body mattered more than her consent. Now the illness born from what Vale Sanctuary did to her is spreading beyond every wall built to hide it. It's crossing state lines, collapsing families, and forcing the country to confront a truth its institutions are desperate to manage before anyone can fully understand it.
Evan Danner knows the pattern is widening. Naomi Crowell knows the systems will protect themselves first. Lydia Grant knows the science may arrive too late. And Mara knows what all of them are trying not to say:
The answer may still be inside her.
As hospitals fill, public language softens, and government officials begin drafting policies around a living woman's body, Mara is offered every version of protection except the one thing she has been denied from the beginning: the right to decide what happens next.
But this time, no one writes the terms for her.
By Her Own Hand is the devastating fourth book in the Last Immunity series — a literary thriller about consent, survival, institutional power, and the terrible cost of becoming the only person who can save the world.
Mara Hale has spent her life being studied, contained, hunted, and renamed by people who believed her body mattered more than her consent. Now the illness born from what Vale Sanctuary did to her is spreading beyond every wall built to hide it. It's crossing state lines, collapsing families, and forcing the country to confront a truth its institutions are desperate to manage before anyone can fully understand it.
Evan Danner knows the pattern is widening. Naomi Crowell knows the systems will protect themselves first. Lydia Grant knows the science may arrive too late. And Mara knows what all of them are trying not to say:
The answer may still be inside her.
As hospitals fill, public language softens, and government officials begin drafting policies around a living woman's body, Mara is offered every version of protection except the one thing she has been denied from the beginning: the right to decide what happens next.
But this time, no one writes the terms for her.
By Her Own Hand is the devastating fourth book in the Last Immunity series — a literary thriller about consent, survival, institutional power, and the terrible cost of becoming the only person who can save the world.
550 pages, Kindle Edition
Published July 3, 2026
About the author
Steven Marks
44 books46 followersMy readers are always welcome to email me at whatifnovels@gmail.com whether it's to discuss plot points, or to yell at me because the story took an unexpected turn, or whatever... feel free! You can also join my email list at stevenmarksbooks.com!
When I was eight, I wrote my first book — eighty‑seven pages, one paragraph, and a sci‑fi story called The Bird of Time. I handed it to my mother, hoping she’d read it. She didn’t even open it. She just said, “Nobody is ever going to read what you write.”
I threw the book away. I didn’t throw away the writing.
My mother struggled with addiction, and I was too young to understand that her words weren’t really about me. But they stuck. For decades, I wrote in secret — twenty‑plus novels that lived in drawers and folders because I was afraid she might be right.
When I turned sixty, I realized something simple and brutal: the only way she’d be right is if I never tried. So I started publishing. And readers found me. And they asked for more.
Maybe she was wrong. Maybe this is the story I was supposed to write all along.
When I was eight, I wrote my first book — eighty‑seven pages, one paragraph, and a sci‑fi story called The Bird of Time. I handed it to my mother, hoping she’d read it. She didn’t even open it. She just said, “Nobody is ever going to read what you write.”
I threw the book away. I didn’t throw away the writing.
My mother struggled with addiction, and I was too young to understand that her words weren’t really about me. But they stuck. For decades, I wrote in secret — twenty‑plus novels that lived in drawers and folders because I was afraid she might be right.
When I turned sixty, I realized something simple and brutal: the only way she’d be right is if I never tried. So I started publishing. And readers found me. And they asked for more.
Maybe she was wrong. Maybe this is the story I was supposed to write all along.
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Displaying 1 - 8 of 8 reviews
July 8, 2026
I received an advance review copy of this book and am leaving my honest review. Steven Marks delivers the perfect ending to an amazing series. The pandemic stakes are higher than ever, and the race against time kept me on the edge of my seat. Mara’s journey is deeply moving, and watching all the subplots collide was incredibly satisfying. It is fast-paced, thought-provoking, and impossible to put down.
July 8, 2026
I received an advance review copy of this book and am leaving my honest review. By Her Own Hand is a thrilling conclusion to The Last Immunity series. The high-stakes pandemic plot kept me hooked from the very first page. Mara’s battle for survival and autonomy is incredibly powerful. Steven Marks wraps up the story beautifully with non-stop tension, grounded science, and great character development. Highly recommended for medical thriller fans!
July 8, 2026
I received an advance review copy of this book and am leaving my honest review.
An engaging blend of science fiction and suspense with strong character development. The plot kept me hooked, and the themes of survival and resilience made this a memorable read. A great ending to The Last Immunity series.
An engaging blend of science fiction and suspense with strong character development. The plot kept me hooked, and the themes of survival and resilience made this a memorable read. A great ending to The Last Immunity series.
July 8, 2026
I received an advance review copy of this book and am leaving my honest review.
An intense, well-written thriller with compelling characters and nonstop tension. Every chapter pushed the story forward, and the ending was both satisfying and impactful. I couldn't put it down.
An intense, well-written thriller with compelling characters and nonstop tension. Every chapter pushed the story forward, and the ending was both satisfying and impactful. I couldn't put it down.
July 8, 2026
I received an advance review copy of this book and am leaving my honest review.
A fantastic finale that raises the stakes in every way. The pacing is sharp, the mystery unfolds naturally, and the emotional moments hit hard. I highly recommend reading the entire series.
A fantastic finale that raises the stakes in every way. The pacing is sharp, the mystery unfolds naturally, and the emotional moments hit hard. I highly recommend reading the entire series.
July 8, 2026
I received an advance review copy of this book and am leaving my honest review.
An intense, well-written thriller with compelling characters and nonstop tension. Every chapter pushed the story forward, and the ending was both satisfying and impactful. I couldn't put it down.
An intense, well-written thriller with compelling characters and nonstop tension. Every chapter pushed the story forward, and the ending was both satisfying and impactful. I couldn't put it down.
July 8, 2026
I received an advance review copy of this book and am leaving my honest review.
A fantastic finale that raises the stakes in every way. The pacing is sharp, the mystery unfolds naturally, and the emotional moments hit hard. I highly recommend reading the entire series.
A fantastic finale that raises the stakes in every way. The pacing is sharp, the mystery unfolds naturally, and the emotional moments hit hard. I highly recommend reading the entire series.
July 8, 2026
A fantastic finale that raises the stakes in every way. The pacing is sharp, the mystery unfolds naturally, and the emotional moments hit hard. I highly recommend reading the entire series.
Displaying 1 - 8 of 8 reviews