Mother Daughter Sister Stranger

Mother Daughter Sister Stranger" is a domestic thriller about sisters Eliza and Bea Ramsey. They survived a plane crash that killed their parents years ago. When Bea goes missing and leaves her young daughter behind, Eliza tries to find her sister. She also wants to protect her niece from thinking she has been abandoned. While searching, Eliza uncovers secrets about Bea that she never knew, as old family issues come back to haunt them.

Macmillan | Sep 1, 2026 | 352 PAGES | ISBN-13 9781538776308 | Thriller

Read the full book summary from the publisher here

Below are five thoughtful discussion questions for Mother Daughter Sister Stranger to help get your book club conversation started. If the author or publisher releases an official discussion guide, we'll add a link here so you can easily find those questions, too.

1. Eliza and Bea survived the same childhood tragedy but may not understand their shared past in the same way. How can two people experience the same event yet come away with very different versions of the truth?

2. When Bea disappears and leaves Piper behind, Eliza must decide what to believe about her sister. At what point should loyalty to someone you love give way to questioning what they may be hiding?

3. Family stories often become accepted as fact simply because they have been repeated for years. Why do you think people are sometimes reluctant to question the stories their families tell about the past?

4. How might surviving the plane crash that killed their parents affect Eliza and Bea's relationship? Do you think going through a shared trauma brings siblings closer or makes things more complicated?

5. The novel raises the unsettling possibility that the people closest to us may have secrets we know nothing about. Do you think it is possible to truly know another person-even someone in your own family? Book club questions from the publisher's Book Club Kit

Book Club Talking Points:
For a group discussion, the novel offers more than a simple mystery. Book clubs can easily dive into conversations about sibling loyalty, the long-term impact of childhood trauma, and the heavy burdens of parental legacies. Because Ryan expertly populates the story with ambiguous motives and shifting tension, members will likely bring entirely different theories to the table regarding who can be trusted. This twisty page-turner guarantees some fun debates.

"Riveting! I'm a huge fan of Hank Phillippi Ryan, and Mother Daughter Sister Stranger is her best thriller yet, with a chain of events as twisty-turny as a skein of DNA and unearthing long-buried family secrets. Ryan is a master of the domestic thriller, mapping the emotional terrain of the family, as well as a brilliant observer of the ties that bind and stretch, sometimes to the breaking point. I couldn't put this novel down until after its final shocking twist." -Lisa Scottoline

"Another brilliant novel from the master of the domestic thriller, with hugely relatable characters and cleverly-crafted family secrets that had me racing through the book to get to the truth." -B.A. Paris, internationally bestselling author of Behind Closed Doors

"Ryan triumphs with her latest, Mother Daughter Sister Stranger, which is as touching as it is thrilling. With characters that leap from the page and Ryan's masterful plotting and incredible twists, readers will devour this in one sitting!" -Mary Kubica, New York Times bestselling author of She's Not Sorry

"Find a comfortable chair and settle in. Hank Phillippi Ryan shows exactly why she's a master of the thriller, delivering a sharp, twisty story of sisters, secrets, and a past that refuses to stay buried." -Meagan Church, New York Times bestselling author of The Mad Wife

"I whipped through Mother Daughter Sister Stranger in one sitting, eager to unearth the secrets so cleverly tucked beneath the surface in this tense, twisty domestic thriller." -Alafair Burke, New York Times bestselling author of The Note

"A well-crafted domestic thriller...As Ryan's fans will expect, she packs the proceedings with big reveals and disturbing backstories, maintaining solid suspense." -Publishers Weekly

"Full of gripping moments...Family secrets, enduring bonds among sisters, and a whodunit involving a possible serial killer all feature in this terrific effort from Ryan." -Library Journal

"Ryan delivers a psychological thriller with a bevy of secrets." -Booklist

Praise for All This Could Be Yours

"Engrossing-with a twist that left me reeling!" -Freida McFadden, #1 New York Times bestselling author of The Housemaid

"A wildly entertaining cat-and-mouse thriller! I absolutely loved this!" -Ashley Elston, #1 New York Times bestselling author of First Lie Wins

"Riveting! A deliciously tense read that caught me in its ever-tightening grip from the first page and refused to let go until the last." -Riley Sager, New York Times bestselling author of The Only One Left

"Clever, thrilling, and impossible to put down. Highly recommend!" -Shari Lapena, internationally bestselling author

"A gripping tale of fame, obsession, and secrets that won't stay buried. A taut, twisty thrill ride-I couldn't turn the pages fast enough!" -Liv Constantine, New York Times bestselling author of The Last Mrs. Parrish

"Ryan has created her best book to date." -Library Journal (starred review)

"...A be-careful-what-you-wish-for tale that delivers on all of its promises. It reads like Harlan Coben or Sandra Brown writing at their level best, as Ryan stakes her claim to the ground roamed by the likes of her literary doppelganger." -BookTrib

"A supremely accomplished book from a master of suspense." -Crime Reads