Which Sister: A Psychological Thriller

by Jack Dane

Both had a reason…but which sister killed him?

Judith, the younger Rose sister, has always been more successful. After marrying Mark, her sister Katie’s former husband, she finally has it all. The perfect job, apartment, and relationship. The perfect life…until secrets about Mark come to light. Secrets worth killing over.

Katie couldn’t be a more total opposite. After her alcoholism ended her marriage, her life began to spiral. And when Mark seeks full custody of their young daughter, Katie has nothing left to lose.

So when Mark goes missing in Central Park, all eyes turn to the Rose sisters. Both have a reason to kill Mark–and both have something to hide.

As the police begin to dig into the sisters and their bitter feud, two facts become Someone is guilty, and no one can be trusted.

Only one question remains…which sister is a killer?



Fans of Freida McFadden, Daniel Hurst and Kiersten Modglin will be utterly glued to the pages as twist after twist is delivered until the mind-bending final reveal that’ll have you gasping out loud.

250 pages, Kindle Edition

Published November 7, 2025

Reviews

[Lindsay Shaw · Rating 5 out of 5]

Great thriller! Definitely kept me interested and maybe im a newbie to Jack Dane, but I didn't see the ending. another great read from Jack and will definitely read more of his!

[Beleisha Bernhardt · Rating 4 out of 5]

"Which Sister" was a great, short read. Jack Dane did a great job of writing a story that left open enough possible twists that you were never quite sure which directions it was going to go while wrapping it all up nicely at the end.

Thank you Netgalley and Jack Dane for this ARC. All thoughts and opinions are my own.

[Diane · Rating 4 out of 5]

SPOILER ALERT!!!! Very unique

Really thought I had it at the beginning after you didn't know who did it. The mother is the only thing I didn't catch. still a great book. A little heavy on the mental issues but I understand why.
They always referred to murder, but without a body I highly doubt Judith would have been thrown in the slammer so fast.
Will read others by Jack.

[Amanda Lopez · Rating 3 out of 5]

3.5 🌟

This book was a great, short but fast-paced thriller that did its job! There was plot twists sprinkled out that you weren’t sure which direction it was going to until the very end, which honestly caught me by surprise. Jack Dane is a new author that I will definitely be reading more books from!

A big thanks to NetGalley and Jack Dane for the opportunity to read this ARC.

[Nicole Collins · Rating 5 out of 5]

This book was s good I read it in 2days I was not expecting the who at all that took me by surprise for sure.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.

[Mandi Dawes · Rating 5 out of 5]

I never have read anything by this author before but I liked this book. The plot was great and the book was page turner. Another sit and finish before you do anything else type of book.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.

[Mindy · Rating 4 out of 5]

Someone online recommended this book and it was fairly short, so I said "why not?" This was a new author for me and his writing style was quick and easy. There was suspense throughout and I didn't see the ending coming. 4 solid stars.

[Terry · Rating 4 out of 5]

Good but not my fave

Another good, fast read but a little disappointing. Hate it when the villain is an out of the blue character ... but Jack pulled it off with the final twists. I didn't love it but I didn't hate it either.

[Janae’ Shannon · Rating 5 out of 5]

I’m reading this and thinking oh I know who killed him, but as I keep reading I’m like yeah no way.. wouldn’t have guessed that. I love his quick paced writing and shocking twists that I didn’t see coming at all.

[Joy Shannon · Rating 5 out of 5]

YES!!!!

As usual, this is one of Jack Dane’s best. I read it in less than 24 hours; although I have read most of his books that way. I did not know how it would end until I got “there.” My goodness. Read it, you will be so glad you did. Way to go Jack Dane!

[Lauri R · Rating 5 out of 5]

Great Book!

I love Jack Dane’s style of writing. Which Sister was suspenseful with plenty of twists. I look forward to Dane’s next release.

[Allison Singleton · Rating 3 out of 5]

i really enjoyed the ending and surprise that came with it. i do feel like these books are a little amateur. not the biggest fan of the story leading up to the ending.

[Barb · Rating 4 out of 5]

Wow what an ending.

[Amanda Hopper · Rating 3 out of 5]

3.5

[Sandy Verschoore · Rating 1 out of 5]

Which Sister

The kind of book you can just skim and understand. Lots of yabber, yabber repetition. Murdered? They never said a body was found.

[iris muller · Rating 4 out of 5]

Pretty good book I like how fast paced it was!

[Amber · Rating 5 out of 5]

Absolute must read you will never see the ending coming.

[Linda · Rating 4 out of 5]

Definitely keeps you turning the pages.

[Annette Yednak · Rating 5 out of 5]

This is a good one !

This book just moved into my top 10 favorites for Psych Thrillers ! It's a don't hesitate just read - kind of read !

[Caitlin Bunting · Rating 4 out of 5]

Another solid thriller from this author. This one was fast paced and kept me hooked throughout. A nice twist that tied the book together. Highly satisfied with this one.

[Kayla Chard · Rating 3 out of 5]

3.5 ⭐️

[Dianne Kessler · Rating 5 out of 5]

Excellent! I never expected that ending!

[Holly Johnson · Rating 5 out of 5]

Fast-moving, easy read. A few surprises, and overall a great story!

[Samantha Shanley · Rating 3 out of 5]

This book was okay at best. The ending was trash. But it was a quick easy read

[Holly Parker · Rating 4 out of 5]

3.5 ish
It was a short read that kept me interested, though wasn't as thrilling as some of the comments made it seem. The author did do a good job with switching up the suspects and twists.

[Chris Dobbins · Rating 4 out of 5]

Surprise ending

4.3/5. Started a little slow and repetitious but the ending was a bit of a surprise and made up for the slow beginning. I may try another book by this author.