My Brother’s Billionaire Bestie Next Door: An Enemies to Lovers Surprise Pregnancy Romance (Sizzling Billionaires)

My Brother’s Billionaire Bestie Next Door: An Enemies to Lovers Surprise Pregnancy Romance (Sizzling Billionaires)

by Gwynne Hart

4.5 (2,189)

4.5 stars from 2,189 reviews. Top 78% of Contemporary Fiction books we track.


$0.99KU80% off peak

Last checked: May 10, 2026

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Fans of these authors will like this...

  • Helen Hoang
  • Talia Hibbert
  • Christina Lauren

Fans of these books will like this...

  • The Hating Game
  • Act Your Age, Eve Brown
  • People We Meet on Vacation

Perfect for you if...

  • You love billionaire romance with real emotional stakes beyond just the steam and want a hero who's genuinely conflicted about breaking the bro-code.
  • You enjoy stories where pregnancy becomes a plot driver rather than just an ending, forcing characters to confront what they actually want.
  • You're after a grumpy-meets-sunshine dynamic with enough tension and chemistry to justify the obsession both characters feel.

Maybe not for you if...

  • You prefer slow-burn romance where attraction builds gradually rather than starting with an instant connection and immediate complications.
  • You're looking for a age-gap romance where the gap feels less extreme or where the power imbalance (boss plus billionaire plus fifteen years) isn't a feature.
  • You want to avoid surprise pregnancy plots, which feel overused in this subgenre.

About this book

A billionaire conceals his identity and meets a woman at a Hollywood event. After an unforgettable night together, he discovers the next morning that she is his best friend's sister. He is now both her boss and her neighbor. Despite their frequent clashes, an undeniable attraction exists between them. He struggles to maintain professionalism, but finds it impossible to stay away. She is fifteen years younger than him and has a powerful effect on his mood. He has developed strong feelings for her. Their connection deepens, but he knows serious consequences will follow if her brother learns about their relationship. That revelation becomes imminent when he discovers she is pregnant. This is a standalone romance with a guaranteed happy ending.

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Price History

Kindle price over time. Green zones = periods when the book was free.

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Free$2.48$4.97Sep '24Mar '25Sep '25Jan '26May '26
$0.99$4.97

Currently on sale at $0.99 — 80% off peak. Price has dropped 5 times over the last 21 months. Goes on sale roughly every 102 days.

Sales Rank

Amazon sales rank: lower number = better selling book. #1 is the bestseller.

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#726#15,693#30,660Sep '24Sep '25Jan '26May '26

Currently around #17K in the Kindle store — a steady mid-list seller.

Rating & Reviews

Purple line = star rating over time. Blue area = total review count growth.

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3.5★4.3★5.0★Sep '24Oct '24Nov '24Nov '25RatingReviews

Currently 4.5★ from 2,189 reviews

Gaining approximately 117 new reviews per month. Reader interest is accelerating. Rating has dipped slightly from 4.7 to 4.5.

Sale Prediction

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Free$2.48$4.97Sep '24Mar '25Sep '25Jan '26May '26PredictedMay '26

Actual Predicted

This book is currently discounted at $0.99. It typically returns to around $4.97.

Prices shown in USD from Amazon US. We continuously pull new data to improve tracking. If dates look old, it usually means there has been no significant change since the last data point.

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Gwynne Hart

1 book on Vagrant Press

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