“You want to know what it feels like to lose control?
Here’s your last chance to say no.”
Top 100 in romantic erotica

The Duality Principle

The Duality Principle

Sometimes opposites do way more than just attract…

Wild passion is a luxury PhD candidate Gabriella Evans can’t afford. Her career needs her complete focus. And the ridiculously sexy tattooed biker she’s seen on the streets of her small coastal town is very distracting. But giving in to her reckless, rebellious desires would be a huge mistake…right?

Connor Starks gave up his bad boy ways long ago. These days, he’ll do whatever is necessary to be a better man. But with Gabriella, everything is harder. Literally. Eventually, he’s afraid he’ll lose control. And if he does, she’d better hang on tight, because it’s going to be a rough, dirty ride…

Can these polar opposites find their way to happily ever after? Only if the ghosts of Connor’s past—the ones that refuse to stay hidden—don’t ruin everything first…

The Duality Principle, book 1 in the Portland Rebels series, is a steamy summer romance featuring a nerdy heroine and a reformed bad boy finding their HEA…with a little spanking and outdoor sex along the way. Grab a glass of ice water (you’ll need it) and download today.

Best Selling Top 100 in Romantic Erotica

Available on KU


Allen’s debut is an utterly charming, delightfully dirty little tale that shouldn’t be missed. Her engagement with her brainy heroine’s secrets is beautifully honest and the addition of a troubled, refreshingly earnest bad boy makes this a memorable read.

— RT Book Reviews

Hot and spicy, this romance was written for all of those readers who like both the good—and the very bad.

— Library Journal

In The Duality Principle, Rebecca Grace Allen introduces us to one of the sweetest reformed rakes ever.

— Heroes and Heartbreakers

The Duality Principle is an exceptional debut with a scorching combination of smart meets sexy.

— Tara Sue Me, NY Times bestselling author of The Submissive Series

A gorgeous, sexy debut from Allen…hits all the right super emotional notes.

— Charlotte Stein

Scorching hot sexual tension that sizzles through the pages…Recommended for those who love stories featuring sexy as sin, reformed bad boys who just can’t help but be bad with the right woman!

— Maldivian Book Reviewer

There’s sexual chemistry, that’s for sure (and fantastic). But there’s also an emotional chemistry that just really made me fall completely in love with these two and their story.

— Amazon review

4.5 Fabulous Stars!!!!!!!!!

— Mia's Point of View

A hot, steamy and intoxicating read!

— Goodreads review

Gabriella and Connor are hard to resist–and an absolutely perfect blend of naughty and nice…The Duality Principle is a brilliant play of romance.

— Amazon review

I love how sweet and considerate Connor is when all Gabby wants is to get down and dirty. A very fun read!

— Lily Maxton

A really fun read with some drama to keep things interesting and incredibly sexy sexy-times.

— We So Nerdy

Other Books in the The Portland Rebels Series

(Book 2)

The Hierarchy of Needs

FriendsToLovers SecondChanceRomance SmallTown

One weekend. No strings. And absolutely no falling in love. ...

Read More
(Book 3)

The Theory of Deviance

BiVirginHero QueerPolyTriad Ménage

If it’s dark, deviant, and wrong, why does it feel so right? Aspiring actress Krissy Porter longs to feel normal again—to finally shed her stage fright and fear of failure. And what could be more normal than dating...

Read More
(Book 3.5)

The Punishment Doctrine

Deviance QueerPolyTriad Ménage

Facing his demons could unlock heaven for him and his lovers...or damn them all to hell. After a week of pure deviance, Rafe, Krissy, and Mikey are giving this triad thing a shot. Sexy video chats keep them connected while Rafe crisscrosses...

Read More
(Book 2.5)

The Spectrum of Desire

Badboy GoodGirl ProposalStory

She’s all he craves. But craving sometimes comes at a cost… Connor Starks is ready to propose. Ever since he fell for Gabriella Evans, the brainy, sexy mathematician who came into his world last summer, she's been...

Read More

Portland Rebels: The Complete Collection

BoxSet CompleteCollection

One Town. Three Romances. Five tales of rebellious love. If you like a series packed with scorching hot summer romance, friends-to-lovers with sizzling chemistry, and unapologetically hot ménage, grab the Portland...

Read More




Recipe for a Reformed Bad Boy
Portland Rebels
Disclosure of Material Connection: Some of the links in the page above are "affiliate links." This means if you click on the link and purchase the item, I will receive an affiliate commission. I am disclosing this in accordance with the Federal Trade Commission's 16 CFR, Part 255: "Guides Concerning the Use of Endorsements and Testimonials in Advertising."