Release Blast: Merciless by Ella Frank & Brooke Blaine

Merciless
(Park Avenue Kings #4)
by Ella Frank & Brooke Blaine
Release Date: October 16, 2025

About Merciless
Who are we? Nobody really knows. We’re seven powerful heirs to empires, ruling Manhattan from our thrones on Park Avenue. By day, we’re the elite, untouchable, and more connected than you could ever imagine. By night, we revel in the darkness of our secrets, pulling strings that make the city bow to our whims.
Ruthless.
Dangerous.
We’re the Park Avenue Kings.
In this city of power and desire, where the line between love and obsession blurs, nothing is off-limits—and we wouldn’t have it any other way.

He was sent to watch me. Now he can’t look away.

They sent the president’s son to babysit me.
How precious.

Shepherd “Shep” Winchester III thinks he’s here to keep me in line—keep me quiet, keep me still, keep me safe.

Good luck with that.

I’m Theodore “Theo” Rinaldi, the youngest Prince of Monaco, and the most merciless of the Park Avenue Kings. And I don’t do obedient. Not for my royal family. Not for the crown. And definitely not for the suit King sent to shadow me.

Shep is all discipline and duty.
I’m chaos in a custom suit.

We clash. We combust.
And then we cross a line we can’t uncross.

Now there’s a blackmailer on our trail, a target on my back, and the Kings think I’m the traitor. But if they want to come for me, they’ll have to get through him.

Because the soldier with the perfect posture and the unreadable eyes?
He’s not just protecting me anymore.

He’s falling for me.

And I’m going to ruin him for it.


Merciless (Park Avenue Kings #4) is the first book in a duet within the Park Avenue Kings series. Ruthless (Park Avenue Kings #5) will be the continuation.




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About Ella Frank & Brooke Blaine

Ella Frank is the USA Today bestselling author of the Temptation series, including TryTake, and Trust and is the co-author of the fan-favorite Preslocke series. Her Prime Time series has been praised as “highly entertaining!” and “sexy as hell!”

A life-long fan of the romance genre, Ella writes contemporary and erotic fiction. Some of her favorite authors include Tiffany Reisz, Kresley Cole, Riley Hart, J.R. Ward, Erika Wilde, Gena Showalter, and Carly Phillips.

*  *  *

Brooke Blaine is a USA Today bestselling author best known for writing romantic comedy and M/M romance. Her novels lead with humor and heart, but Brooke never shies away from throwing in something extra naughty that will scandalize her conservative Southern family for life (bless their hearts). 

She's a choc-o-holic, lives for eighties bands (which means she thinks guyliner is totally underrated), believes it's always wine o'clock, and lives with the coolest cat on the planet—her Ragdoll/Maine Coon mix, Jackson Agador Spartacus. 

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