The Darkness of Evil | Karen Vail Novel Series #7 | A Book by Alan Jacobson

The Darkness of Evil

Now Available

The latest installment in the award-winning, critically acclaimed Karen Vail series from USA Today bestselling author Alan Jacobson features esteemed FBI profiler Karen Vail on the hunt for an escaped serial killer…

A Closer Look

Karen Vail Series

Karen Vail is no ordinary FBI agent.

She’s a profiler, brought to life by Alan Jacobson’s seven years of unprecedented access to, and research with, the FBI’s Behavioral Analysis Unit. The Karen Vail series has been raved about by reviewers, readers, law enforcement officers of all stripes, real FBI profilers…and even one of the legendary founding fathers of the Behavioral Analysis Unit in Quantico.

View All Karen Vail Novels
Karen Vail Novel Series | Karen Vail is no ordinary FBI agent. | Novels by Alan Jacobson

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OPSIG Team Black Series Novels

America’s safety is on the line!

Missions the United States government cannot sanction–or acknowledge–fall under the purview of OPSIG, the Operations Support Intelligence Group, run out of a secret office in the basement of the Pentagon.

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Alan Jacobson

Meet Alan Jacobson

I’m often fascinated by how and why things happen—and how chance meetings and random occurrences, years later, can have an enormous impact on one’s life. There are many such examples to choose from, but I’ll share two with you because of the impact they had on my writing career.

Read more about Alan

​Martini Productions Interview

Host Jessica Mazo of Martini Productions interviews Alan Jacobson at ThrillerFest about his two series, the OPSIG Team Black novels and the FBI profiler Karen Vail books—and the close quarters combat training he did in the Phoenix desert with Chris Kyle’s Craft International.

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Books du Jour PBS NYC interview

Alan sits down with PBS’ Books du Jour host Frederic Colier to discuss the sixth Karen Vail novel, Spectrum, why he chose to take us back in time to Vail’s first day on the job with the NYPD as a beat cop—and his 9/11 dilemma.

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Book Case TV interview

Alan talks with Book Case TV’s Frederic Colier about No Way Out, how he found himself face to face with a real FBI profiler more than two decades years ago, and how that profiler became instrumental in helping him shape all of the Vail novels.

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No Way Out trailer

FBI Profiler Karen Vail returns in her fifth adventure, No Way Out, a high-stakes thriller set in England. Join Alan on location in London as he brings Karen Vail to your doorstep and touches on some of the problems Vail faces assimilating to the British culture—and the off-limit places Alan visited while researching the novel.

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The 7th Victim trailer

Alan gives us insight into the mind of Karen Vail, the baggage she must deal with, and the challenges she faces with the Dead Eyes killer.

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Recent Books by Alan Jacobson


The Darkness of Evil | A new novel by Alan Jacobson

The Darkness of Evil (Karen Vail #7)

The latest jaw-dropping thriller from USA Today bestselling author Alan Jacobson, featuring esteemed FBI profiler Karen Vail, on the hunt for an escaped serial killer …

Spectrum, a book by Alan Jacobson

Spectrum (Karen Vail #6)

Authoritative, compelling and crisp, Spectrum moves with a velocity that seems to make the pages turn themselves.

The Lost Codex | A novel by Alan Jacobson

The Lost Codex (OPSIG Team Black #3)

From the first page, you know you’re in the hands of a storyteller at the top of his game: The Lost Codex has nonstop action, living-breathing characters, rich detail …”

No Way Out | A novel by Alan Jacobson

No Way Out (Karen Vail #5)

“Jacobson mixes rocket-paced suspense with fascinating history in this thrill ride of a book.”

Hard Target | A novel by Alan Jacobson

Hard Target (OPSIG Team Black #2)

An enigmatic covert operative. A skilled FBI agent with a dark past. And a terror plot unlike any in history.

Innmate 1577 | A Novel by ALan Jacobson

Inmate 1577 (Karen Vail #4)

“Inmate 1577 is another rippin’ good ‘Alan Jacobson read’! Jacobson researches his books like a good newspaper reporter, and then pushes the envelope …”

Stand Alone Thrillers and Short Stories

False Accusations | A stand alone thriller by Alan Jacobson

False Accusations

“Alan Jacobson has crafted a riveting story with a truly frightening villainess. This is a terrific book!”
John Saul, New York Times bestselling author

Double Take | A stand alone Short Story by Alan Jacobson

Double Take

“Alan Jacobson writes with a sure hand, a strong voice, and a fine eye for detail.”
– Ridley Pearson, New York Times bestselling author

Fatal Twist | A stand alone Short Story by Alan Jacobson

Fatal Twist

“Karen Vail is a knockout, tough and brilliant.”
– Tess Gerritsen, New York Times bestselling author & creator of Rizzolli & Isles TV series

Our Blog


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