After twelve years as a yoga and pilates instructor, Heidi Tankersley dove full-time writing novels. She reads a lot of teen and young adult books. She also reads a lot of personal growth and development books, because she knows her writing career will only grow as big as she grows herself and her writing.

Heidi is married to a fantastic man, has two brilliant children, and two lovable golden retrievers. She grew up in a small town in Kansas, but now resides in Northwest Arkansas.

She is currently in the middle of the young adult book series, The Mod Code.

Book #3 releases Feb. 14, 2018 and book 4 (the final book in the series) will release Dec. 2018.

You can find her books at

The Mod Code by Heidi Tankersley

Twin brothers. One modified, one not.
The girl they both love.
A gene code their fathers want to force into the world.

Sage is kidnapped from her Kansas farm and held for ransom on a remote Pacific island. If she wants to survive,she must sort out truth from the lies of her past.

Jack and Beckett have lived with their dad's obsession of the mod code ever since the day they were born—and now he's taking captives in attempt to get the mod code back.

Beckett will do anything to save the girl. Jack will stop at nothing to destroy the code. But doing either may require that the brothers let go of the one person they've both come to love.


Nothing keeps a reader turning the pages like cliffhangers, and Heidi Tankersley's The Mod Code has one in just about every chapter. And just when you think you've figured out this story about genetic engineering… surprise! You haven't. Nothing is predictable in this tale about a very possible near future. – Nick Harlow



  • "Full of action, intrigue, and adventure, this story is one that stays with you and makes you yearn for more!"

    – Carrie Jones, New York Times bestselling author of the Need series
  • "Worth staying up all night to read!"

    – F. Branch
  • "Drama. Excitement. All the angst of a three-sided love and a teenage girl coming into her own. I can't wait to read the next one."

    – Gail K.
  • "Fast paced. Twists and turns. Nearly impossible to set down. I'm definitely looking forward to more from this fresh, new author."

    – A. Baker
  • "I just finished THE MOD CODE. I couldn't hardly put it down. I had to stop reading, so I could actually get some sleep. Is there a sequel coming? I didn't want it to end."

    – L. Burkert
  • "Fabulously woven plot with dynamic characters, led by a spirited heroine. This book was thrilling from beginning to end—by far my new favorite."

    – Amazon Reviewer



"Stop the car." Mom leaned forward, squinting through the windshield at the black car. "Turn around."

My stomach contracted. I usually tried not to let Mom's paranoia rub off on me, but this felt different. Something was wrong.

I slowed the car.

Finn looked up from his phone, where he'd no doubt been texting Katie. "What's going on? The fair starts in fifteen minutes."

In the small amount of time it took me to rotate the opposite direction, the black car turned onto the same road, only six hundred yards back. As I accelerated, it gained on us.

"Mom?! What is going on? Why are we being chased?" I shouted.

Mom looked up from fumbling through her purse. "Where's my phone?" she cried. "Finn! Text Peg! Type S.O.S. Sage, go faster!"

"Faster?!" I was already going sixty, faster than I'd ever driven on this road in my entire life. The black car drew closer. Finn, silent and pale, clutched the shoebox to his chest.

My entire body shook as I pressed the accelerator all the way to the floor.



It felt like the tires hardly touched the ground. My heart beat wild in my chest, mouth dry. There was no more space to talk. One shift of the wheel now, and it was over. The black car sped up directly behind us, the dark shape filling my entire side mirror.

Eighty-four miles per hour.

Then, our front tire caught on a soft patch of rock.

We spun. Once, twice, five times. I couldn't tell. I only heard my screams.

At some point, we were rolling. Over and over.

Finally, our car slammed to a stop and my airbag exploded. My head and chest whipped against the white balloon, the seat belt burning across my chest.

As the bag deflated, I only saw dust. When it cleared, a barbed-wire fence and wooden post came into view, crushed into the right side of the hood. Everything fell absolutely quiet, save for the hissing of the engine. Pain pulsed through my spine, in rhythm with my soaring heartbeat.

What. Was. Happening? My hands shook as I dabbed at the warm sensation on my neck. Blood. I wiped it away, unable to tell the source.

I turned. "Mom." My voice came out raspy, shaky. Dust coated my throat.

Blood streamed down Mom's temples, her head dropped against the seat, eyes closed. My hand stretched toward her. "Mom!"

Drops of rain started to fall, hitting the windshield one or two at a time. The windshield had cracked in front of Mom—a web of shattered glass radiating outward from a center circle. Had her head hit the glass?

"Finn." I turned a few inches, and pain shot into my skull. Finn slouched in his seat, unconscious—or dead? Noxley lay on the floorboard, bottom-side-up, neon green body unmoving.

The shiny sedan pulled to a stop on the road. A car door opened. Then another and another. Three men. Two in black suits, one in gray fatigues.

"Mom!" I screamed, shaking her harder this time. No response.

My hands groped for her purse. I needed her cell phone. Then Mom coughed.

"Hope." Her mouth barely moved. "Run." She licked her lips, eyes still closed. "Run."


The men were at my door, one pulling on the handle, the other two peering through the windows at my brother, my mother. I struggled with the seatbelt clasp. If I could get out of here, get to Beckett, get to the police, get to somebody ….

The man in gray fatigues used his elbow to shatter the driver's window. I screamed. He drew back his arm and brushed glass from his sleeve.

The man's hands patted inside the frame, grabbing for the handle, and the nearness of his body sent a white hot panic through me. I screamed at the seatbelt to release.

The door pulled open, and I punched at the man's arms as he tried to reach for me.

A rag went to my face. Then, blackness.

Just before the unconsciousness hit, Mom's words ran through my head again.

Hope. Run.