A genius FBI code breaker unravels the mysteries of one of history’s most monumental puzzles in a propulsive thriller by Jess Lourey, the Edgar Award–nominated author of Salem’s Cipher.

Working for the FBI, cryptanalyst and agoraphobe Salem Wiley vows never to return to the conspiratorial underworld her mother revealed to her. Until fieldwork draws Salem to an Ireland farm where a curious discovery has been unearthed: a near-perfect replica of Stonehenge in miniature—except for one extra stone engraved with the word mercy.

When seven-year-old Mercy Mayfair, a child in Salem’s family’s care, is kidnapped, Salem knows it’s more than an unsettling coincidence. Mercy’s centuries-old lineage holds the key to understanding the greatest Neolithic mystery of the ages. A dangerously patriarchal society, just as ancient, will kill to solve it.

As Salem follows a serpentine trail of clues and ciphers, the clock is ticking and her fears are escalating. Because the only way to save Mercy is for Salem to crack the unbreakable code of Stonehenge first.

Revised edition: This edition of Mercy's Chase includes editorial revisions.

Jess Lourey is the Amazon Charts bestselling author of The Taken Ones, The Quarry Girls, Litani, Bloodline, Unspeakable Things, The Catalain Book of Secrets, the Salem’s Cipher thrillers, and the Murder by Month mysteries, among many other works, including short stories, young adult fiction, and nonfiction. Winner of the Anthony, Thriller, and Minnesota Book Awards, Jess is also an Edgar, Agatha, and Lefty Award–nominated author; TEDx presenter; Psychology Today blogger; and recipient of The Loft’s Excellence in Teaching fellowship. Check out her TEDx Talk for the true story behind her debut novel, May Day. She lives in Minneapolis with a rotating batch of foster kittens (and occasional foster puppies, but those goobers are a lot of work). For more information, visit www.jessicalourey.com.