With a madman in control of the timeline, one wrong move could be the last for time travelers intent on stopping him in this mind-bending novel by the bestselling author of the CHRONOS series.

CHRONOS historians Madi, Tyson, and Katherine and their cohorts are on the enemy’s trail, fixing the mess that sociopath Saul Rand has made of history—and of the Temporal Dilemma rules. Another time shift is on the horizon, and this time, it’s one that reflects Saul’s twisted vision.

When the shift hits, it plunges the United States into a modern dark age where superstition trumps science and seventeenth-century witch hunts are no longer a thing of the past. But Saul has added a new hurdle to this insane reality: he’s hunting the Sisters of Prudence.

Clones of Katherine’s daughter, the Sisters are pawns to be sacrificed on Saul’s time chessboard—unless the team can track him down at the 1967 Monterey Pop Festival and erase him first. Saul is calling the shots, so he’s ahead of them every step of the way. With the clock ticking, this could be the endgame for CHRONOS and, if they fail, for reality itself.

Rysa Walker is the bestselling author of The Delphi Trilogy (The Delphi Effect, The Delphi Resistance, and The Delphi Revolution); the CHRONOS Files series (Timebound, winner of the grand prize in the 2013 Amazon Breakthrough Novel Awards, Time’s Echo, Time’s Edge, Time’s Mirror, Time’s Divide, and Simon Says: Tips for the Intrepid Time Traveler); and Now, Then, and Everywhen and Red, White, and the Blues in the CHRONOS Origins series. Her career had its beginnings in a childhood on a cattle ranch, where she read every book she could find, watched Star Trek and The Twilight Zone, and let her imagination soar into the future and to distant worlds. Her diverse path has spanned roles such as lifeguard, waitress, actress, digital developer, and professor. Through it all, she has pursued her passion for writing the sorts of stories she imagined in her youth. She lives in North Carolina with her husband, her two youngest sons, and a hyperactive golden retriever. Discover more about Rysa and her work at www.rysa.com.