Angelhart Investigations: Book 3
Publication Date: September 15, 2026
In New York Times bestselling author Allison Brennan’s latest Angelhart Investigations novel, Margo finally has a new lead in the case that tore her family apart.
Private investigator Margo Angelhart has recently rejoined her family’s PI business, but she never forgot the reason she walked away. Three and a half years ago, her father, Dr. Cooper Angelhart, pled guilty to killing his colleague. While she never believed he was guilty, her mother, Ava, refused to help investigate and wouldn’t explain why.
When a nurse who once worked with Cooper reaches out, Margo leaps at what could be a potential lead…only to stumble across the nurse’s grisly murder. Then, Cooper is mysteriously transferred to a penitentiary out of state in the middle of the night, and Ava finally discloses why her husband confessed to a murder he didn’t commit.
Now the entire Angelhart family must fight to clear Cooper’s name. But every step they take drags them deeper into a deadly conspiracy…and into the crosshairs of some very powerful people with fortunes on the line. They’ve killed to keep their secrets before. And this time, the target is an Angelhart.
If there’s one thing motivating Margo Angelhart, it is a never-ceasing quest for justice.
Author Allison Brennan serves up the third installment of the Angelhart Investigations series with I’ll Be Watching You. Easily read as a standalone but optimally enjoyed if read in sequence, the story delivers both the thrills and action typical of the author.
Margo is a determined private investigator whose dedication to family has caused more than a few arguments. Her stubbornness is also part of why she can’t leave her father’s case alone.
It’s not until she discovers a new angle that she gains insight into her father pleading guilty to a murder he didn’t commit. Now, the entire family is in the crosshairs of a dangerous conspiracy with a seemingly all-knowing adversary.
The family dynamics bring the characters alive, as does Margo’s budding relationship with Cal. The conclusion offers a satisfying way to wrap up Margo’s quest while bringing the family closer.
I’ll Be Watching You delivers a pulse-pounding thriller that threatens the Angelhart family.
ALLISON BRENNAN is the New York Times and USA TODAY bestselling author of over fifty novels. She has been nominated for Best Paperback Original Thriller by International Thriller Writers and the Daphne du Maurier Award. A former consultant in the California State Legislature, Allison lives in Arizona with her husband, five kids and assorted pets.
