Do Not Open

Price: $16.99 - $6.99
(as of Mar 04, 2026 01:42:43 UTC – Details)

On the day author Mari Morgan receives the email, she has little left to live for.

The message—simple yet utterly life-changing—offers a glimmer of hope to her dismal existence. It’s the opportunity of a lifetime, and if she takes it, it could change everything.

Mari’s immediate sense of unease is eclipsed only by her curiosity—elicited from the supposed fan on the other end of the email. Unsatisfied despite doing her due diligence, and with no way to discern the legitimacy of the sender, Mari takes a leap of faith and replies.

What harm could come from one innocent message?

Soon, as she comes face to face with her ‘number one fan,’ it’s all too clear things are not what they first appeared. Now trapped by a villain far more sinister than she could’ve crafted herself, the fate awaiting her is inspired by the darkest depths of the monsters in her own novels.

In order to escape and survive, Mari must use the strength of the heroines she’s spent years writing about. But this villain has spent years inside her worlds, too.

How will she defeat an evil who has learned from the best?

For fans of Misery, YOU, and Behind Closed Doors, million-copy bestselling author Kiersten Modglin brings us a haunting tale of obsession and survival in the form of a writer’s worst nightmare come to life.

From the Publisher

Kiersten Modglin, two million copy bestselling author

PRAISE FOR KIERSTEN MODGLIN:

“Plan to lose sleep…”

“Dark, twisted, and deliciously addictive!”

“Modglin writes the best psychological thrillers out there.”

“I have never found a more clever author than Modglin.”

“…one of the very best authors of our time!”

“Twists and turns everywhere you look…”

“…epically unexpected.”

“Modglin’s books sink their claws into you.”

“…dark, tantalizing and OHHH SO scandalous.”

“…one of the best, most unpredictable twists I’ve ever read.”

Welcome to the KMod Squad…

KIERSTEN MODGLIN is a #1 bestselling author of psychological thrillers.

Her books have sold over two million copies and have been translated into multiple languages. Kiersten is a recipient of ThrillerFix’s Best Psych Thriller Award, Suspense Magazine’s Best Book of 2021, and a Silver Falchion for Best Book of 2021. Kiersten’s readers across the world call her “KMod.” A binge-watching expert and indoor enthusiast, Kiersten enjoys days spent with her favorite people and evenings with her nose in a book.​

Not sure where to start? Try one of these reader favorites:

The Arrangement Trilogy Hemlock The Missing The Reunion The Mother-in-Law My Husband’s Secret Do Not Open The Family Secret

ASIN ‏ : ‎ B0CK11HNS7
Publisher ‏ : ‎ Kiersten Modglin
Accessibility ‏ : ‎ Learn more
Publication date ‏ : ‎ October 31, 2023
Language ‏ : ‎ English
File size ‏ : ‎ 1.0 MB
Screen Reader ‏ : ‎ Supported
Enhanced typesetting ‏ : ‎ Enabled
X-Ray ‏ : ‎ Enabled
Word Wise ‏ : ‎ Enabled
Print length ‏ : ‎ 220 pages
Page Flip ‏ : ‎ Enabled
Best Sellers Rank: #16,841 in Kindle Store (See Top 100 in Kindle Store) #288 in Domestic Thrillers (Kindle Store) #355 in Domestic Thrillers (Books) #391 in Kidnapping Thrillers
Customer Reviews: 4.3 4.3 out of 5 stars (4,862) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });