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Operation: Enduring Angel
The Shepherd Security Series, where the mission and love collide.
Shepherd Security recruits only the elite. United States Marine Raider Rich “Handsome” Burke lives for the mission, burying his personal life beneath relentless operations and high-stakes assignments. Discipline, sacrifice, and loyalty are at the core of who he is.
At Shepherd Security, they hunt down predators, rescue the vulnerable, and step into situations that require a less official force that can color outside of the lines. As the agency expands into domestic operations, taking on cases that blur the line between military missions and law enforcement, the stakes have never been higher—or deadlier.
A woman fears for her life from her husband, who she says is part of a private militia. A college coed has disappeared, and a woman Burke has kept at arm’s length for her own good for over a year has witnessed a murder. He knows working on her case will bring them closer. He learns that keeping things as just friends only works if there’s no attraction.
this story is realistic, with adult language and content on the way to the HEA. This is book 19 in the Shepherd Security series. Even though the story does continue from book to book, each is a stand-alone story and can be read without reading the prior book(s), but they are best enjoyed in order.
Shepherd Security recruits only the elite. United States Marine Raider Rich “Handsome” Burke lives for the mission, burying his personal life beneath relentless operations and high-stakes assignments. Discipline, sacrifice, and loyalty are at the core of who he is.
At Shepherd Security, they hunt down predators, rescue the vulnerable, and step into situations that require a less official force that can color outside of the lines. As the agency expands into domestic operations, taking on cases that blur the line between military missions and law enforcement, the stakes have never been higher—or deadlier.
A woman fears for her life from her husband, who she says is part of a private militia. A college coed has disappeared, and a woman Burke has kept at arm’s length for her own good for over a year has witnessed a murder. He knows working on her case will bring them closer. He learns that keeping things as just friends only works if there’s no attraction.
this story is realistic, with adult language and content on the way to the HEA. This is book 19 in the Shepherd Security series. Even though the story does continue from book to book, each is a stand-alone story and can be read without reading the prior book(s), but they are best enjoyed in order.
432 pages, Kindle Edition
Published April 24, 2026
About the author
Margaret Kay
53 books108 followersMargaret Kay is a wife, a mother of two adult children, a grandmother, a pet lover who makes her own dog food from scratch, and a writer of Military Romance Novels.
Margaret's husband proudly served 8 years in the United States Navy. She's a veteran of more than a few deployments as the spouse who took care of the family while her military member served halfway around the world.
Margaret's husband proudly served 8 years in the United States Navy. She's a veteran of more than a few deployments as the spouse who took care of the family while her military member served halfway around the world.
Ratings & Reviews
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Displaying 1 - 15 of 15 reviews
April 30, 2026
Burke and Donna
This story was unusual as there was two cases for Shepherd Security covered that Rich Burke investigated. The first, in which Burke and Donna thought about their relationship and the second where they cemented their relationship. The two cases didn't link otherwise, they were apart except for phone calls and texts and that puzzled me.
The series is always well written but I struggled with this one, especially all the details in the first case. Interesting though
This story was unusual as there was two cases for Shepherd Security covered that Rich Burke investigated. The first, in which Burke and Donna thought about their relationship and the second where they cemented their relationship. The two cases didn't link otherwise, they were apart except for phone calls and texts and that puzzled me.
The series is always well written but I struggled with this one, especially all the details in the first case. Interesting though
April 30, 2026
Shepherd does it again
I love to read and when I see a story written by Margaret Kay, I know it's going to be a best seller with Shepherd Security! From the beginning of the story you're caught up with the drama, full of action packed pages that you may as well forget sleeping! You become engrossed in this family of all the operators that it's hard to be waiting for the next story to arrive.
I love to read and when I see a story written by Margaret Kay, I know it's going to be a best seller with Shepherd Security! From the beginning of the story you're caught up with the drama, full of action packed pages that you may as well forget sleeping! You become engrossed in this family of all the operators that it's hard to be waiting for the next story to arrive.
May 19, 2026
Operation Enduring Angel by Margaret Kay
This is the 19th book in this series. This is Handsome and Donna’s story. The two of them met in the last book when he had to protect both Donna and her children. They remained close for a year as friends. That friendship evolved in to a relationship. Donna had to accept his job with its dangers. They got their HEA but it took a while.
This is the 19th book in this series. This is Handsome and Donna’s story. The two of them met in the last book when he had to protect both Donna and her children. They remained close for a year as friends. That friendship evolved in to a relationship. Donna had to accept his job with its dangers. They got their HEA but it took a while.
May 6, 2026
Chandra's Review
I truly love this series it never disappoints! From the beginning to the end it is intriguing, mysterious, loving, and full of action! I would definitely recommend this book to read! 🤗🤗👏🏾👏🏾
I truly love this series it never disappoints! From the beginning to the end it is intriguing, mysterious, loving, and full of action! I would definitely recommend this book to read! 🤗🤗👏🏾👏🏾
May 8, 2026
A fantastic series
This was an intense, complex, and suspenseful story, and a terrific addition to the series. It's a definite must read book and series.
I would definitely recommend this book, series, and outstanding author.
This was an intense, complex, and suspenseful story, and a terrific addition to the series. It's a definite must read book and series.
I would definitely recommend this book, series, and outstanding author.
May 1, 2026
Romance
Thank you for sharing these wonderful romance novel series books. Please keep writing more of these wonderful books. Thank you
Thank you for sharing these wonderful romance novel series books. Please keep writing more of these wonderful books. Thank you
May 3, 2026
Great read
This book is a romantic suspense novel about Richard Burke and Donna Saxton getting together with each other. This book is a great story. HEA
This book is a romantic suspense novel about Richard Burke and Donna Saxton getting together with each other. This book is a great story. HEA
May 15, 2026
Enduring Angel
This book was really good just like rest of the book in the series Fast paced. Action packed , and romance awesome!!
This book was really good just like rest of the book in the series Fast paced. Action packed , and romance awesome!!
May 27, 2026
Great book
I couldn't wait for this book. I wanted...needed to know Rich and Donna's story! Can't wait for the next book in the series! !
I couldn't wait for this book. I wanted...needed to know Rich and Donna's story! Can't wait for the next book in the series! !
May 28, 2026
Great!
Just enough action to keep it interesting with a little love and a change in relationship between Handsome and Donna.
This is another great read.
Just enough action to keep it interesting with a little love and a change in relationship between Handsome and Donna.
This is another great read.
June 29, 2026
My reading: 3-3/4 stars
July 30, 2026
I felt like this book was back in the groove. Good writing.
August 13, 2026
Mission Overload
Too much time spent on boring mission details and not enough focus on the characters. Quickly trying to throw together a convoluted story at the end of the book for more drama and wrapping it up in one chapter is confusing and unnecessary. I expected much better.
Too much time spent on boring mission details and not enough focus on the characters. Quickly trying to throw together a convoluted story at the end of the book for more drama and wrapping it up in one chapter is confusing and unnecessary. I expected much better.
May 12, 2026
Love, love this author and this series. Would never give any spoilers.
May 29, 2026
This book has a lot going on. I enjoy the characters and the suspense in this book. The way the personal lives of the characters are woven into the story is entertaining. It has an exciting and happy ending.
Displaying 1 - 15 of 15 reviews