Sinner
Author: Sierra Simone
- Book Boyfriend 4/5
- Spice Rating 4.5/5
- Tension Rating 4/5
- Dark Romance Rating 1/5

Drink: Seraphim
Drink Recipe:
- 2 ounces of gin
- 1 ounce dry vermouth
- 1 ounce creme de cassis
- Garnish with a lemon twist
Book Recipe:
- 2 parts dirty dirty mouth
- 1 part he falls first
- 1 part spicy instruction in the bedroom
- Garnish with another Bell brother’s creative use of oil
Sean Bell is a self-proclaimed sinner—a man who worships at the altar of wealth, pleasure, and expensive whiskey. He doesn’t believe in goodness, let alone God, until Zenny Iverson, his best friend’s little sister, comes crashing into his life with an unexpected request: she wants him to teach her about desire before she takes her vows as a nun. Torn between temptation and morality, Sean knows every reason why he should say no—she’s too young, she’s off-limits, and her future is meant for something more than him. But denying his attraction proves impossible, and as their lessons turn into something deeper, Sean is forced to confront not only his faith but also his heart. Sinner is a provocative and emotional story of forbidden love, temptation, and redemption.
A Dirty, Devastating, and Deliciously Spicy Romance
If you’re looking for a book boyfriend who is absolutely sinful in all the best ways, then Sinner by Sierra Simone is exactly what you need to pick up next. This book is intensely erotic, deeply emotional, and surprisingly thought-provoking, all wrapped up in the smooth-talking, dirty-mouthed, undeniably irresistible Sean Bell. But let’s make one thing clear right away—this book is not for the faint of heart. It’s filthy, decadent, and so well-written that it keeps you hooked from the first page (or minute, if you’re listening to the audiobook).
A Must-Listen Audiobook Experience
So let’s start with the audiobook, because if you’ve never listened to a Sierra Simone book, this is the perfect place to start. Narrated by Jacob Morgan, who is basically the king of seductive, deep-voiced book boyfriends, Sinner is an experience. Even though this isn’t a duet narration (meaning: one narrator handles both the male and female voices), Morgan’s performance is so immersive that you don’t even notice. His portrayal of Sean Bell is absolute perfection—capturing his confidence, his internal struggles, and, of course, his filthy, sinful ways in the bedroom. Seriously, do not listen to this book in public unless you’re okay with blushing uncontrollably.
Meet Sean Bell: The Ultimate Temptation
Sean Bell is that book boyfriend—the one who should be off-limits but is just too tempting to resist. He’s a self-proclaimed sinner, wealthy, powerful, and a bit of a playboy, but the second he meets Zenny, everything changes. This book explores forbidden love with a religious twist, as Zenny is about to take her vows as a nun, and Sean is the last person she should be turning to for guidance… but also the only person she wants.
And Sean’s struggle? Chef’s kiss. He’s torn between desire and morality, between faith and pleasure, and that inner conflict makes this book so much more than just a spicy read—it’s a deeply emotional one, too. He’s the perfect blend of protective, cocky, and vulnerable, and watching him fall head over heels for Zenny is an experience in itself.
The Spice? Oh, It’s Sinfully Good
If you’ve read Priest by Sierra Simone, you already know she writes some of the best, most intense, and wildly explicit scenes in the romance genre. But Sinner? Takes it to another level. The chemistry between Sean and Zenny burns through the pages, and Sean’s dirty talk is so outrageously good, it’s practically a sin in itself. This book is erotic without feeling gratuitous, blending sensuality with deep emotional stakes.
Final Thoughts: Read This Book… But Maybe Not in Public
If you’re looking for a book that is both emotional and sinful, raw and passionate, and packed with character growth, Sinner is the one for you. Whether you’re reading or listening, Sean Bell is going to steal your heart and set it on fire. Just be warned: this is not a book to casually listen to at work or in public unless you’re okay with some serious secondhand embarrassment.
So, if you’re ready for a deliciously scandalous, thought-provoking, and emotionally gripping romance, Sinner is an absolute must-read. Now go forth and sin responsibly. 🔥

Want the spice without the commitment, here are the spicy chapters: 1, 6, 7, 9, 11-14, 18-19, 21-22, 26, 33 & Epilogue.
How to Contact Us! Want to recommend a book or chat about your favorite scandalous book boyfriend? Reach out—we’re always ready for another sinful read! Do you think we should finish the series with Saint?
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