Doubt: A Forbidden Brother’s Best Friend Romance

Name: Doubt: A Forbidden Brother’s Best Friend Romance
Price: 4.99 USD
Availability: InStock
Rating: 4.4 (1209 reviews)
Author: Kathy Lockheart

by Kathy Lockheart

Romance Thriller Dark Romance

4.4 (1,209)

4.4 stars from 1,209 reviews. Top 88% of Romance books we track.

470 pages~7.8 hr readPublished 2026-02-12

$4.99At peak price

Last checked: Dec 13, 2025

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Price range: $4.99 – $4.99

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Perfect for you if...

You love morally grey heroes who bend rules for the right reasons and aren't afraid to be possessive about protecting their person.
You want forbidden romance with real stakes: she's dangerous, complicated, and everything he shouldn't want, but he wants her anyway.
You're after that gripping mix of courtroom tension and intimate character development where the legal mystery matters as much as the love story.

Maybe not for you if...

You prefer heroes who follow the ethical rulebook and don't blur professional boundaries, even for the woman they love.
You need a lighter read. This has a darker edge with triggers around trauma, secrets, and morally grey choices that some find heavy.
You want a quick, breezy romance. At 470 pages with courtroom drama woven through, this rewards readers who can sit with complexity.

About this book

A woman is charged with murder after being found in the woods with a bloody knife and a dead body, with no memory of the events. Ryker Kincaid, Chicago's most ruthless defense attorney and her brother's best friend, takes on her case. He believes in her innocence and is willing to risk his career and reputation to prove it. Ryker moves her into his penthouse and demands complete honesty in exchange for his help. She has long avoided revealing her secrets, fearing that truth will cause people to abandon her. As the case progresses and hidden truths emerge, she must decide whether to trust him with her darkest past. The central question becomes whether Ryker will stay once he learns everything about her. This is a standalone brother's best friend romance featuring a morally gray, protective protagonist and a grumpy hero. The story includes themes of secrets, lies, hidden pasts, and forced proximity. It concludes with a happy ending.

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$4.99 – $4.99

Sales Rank

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Currently #819 in the Kindle store — a top-1,000 bestseller.

Rating & Reviews

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Currently 4.4★ from 1,209 reviews

Gaining approximately 879 new reviews per month. Reader interest is surging. Rating has dipped slightly from 5.0 to 4.4.

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