Three deadly investigations. One relentless FBI agent. And a conspiracy that threatens to destroy everything she believes in.

FBI Special Agent Emily Slate has spent her career hunting killers. But when a mysterious data breach forces her out of Washington, D.C., she discovers that the most dangerous enemies aren't always the ones she's chasing.

Sometimes, they're the ones standing beside her.

Reassigned to Albuquerque, Emily finds herself investigating a young woman's murder in the unforgiving New Mexico desert. What begins as a seemingly isolated killing quickly spirals into a deadly conspiracy stretching far beyond the desert highways. With only her trusted partner, Zara Foley, at her side, Emily must untangle a web of betrayal before more innocent lives are lost.

But the nightmare is only beginning.

A devastating phone call draws Emily back to Washington, where a sinister plot has taken hold inside the FBI itself. Agents are dying. Loyalties are shifting. And an unseen adversary seems to know Emily's every move. With her career in ruins and nowhere left to turn, she'll have to risk everything to expose a traitor hiding in plain sight.

And just when Emily thinks she's finally escaped the shadows, a new assignment brings a fresh kind of horror.

Now leading an elite FBI team, Emily is called to investigate disturbing allegations at a remote psychiatric facility. Patients are vanishing from their families' lives. Staff members are keeping secrets. And behind locked doors, someone is willing to kill to keep the truth buried.

From the desolate highways of New Mexico to the dark corridors of Washington and the chilling walls of an isolated institution, Emily faces three of her most dangerous investigations yet.

Because some monsters hide in the darkness. Others hide behind a badge. And some are hiding where no one will ever think to look.

This gripping three-book collection includes The Passage, Fire in the Sky, and The Killing Jar (Books 16–18) from the bestselling Emily Slate FBI Mystery Thriller series by Alex Sigmore. Packed with shocking twists, relentless suspense, and unforgettable characters, these pulse-pounding mysteries are perfect for readers who love strong female investigators, high-stakes conspiracies, and thrillers that refuse to let go.