Two secret societies vie for control of the ultimate medical miracle in a thriller from the New York Times-bestselling author of The Hidden series.

Medical examiner Laura Fanning has two charred corpses and no answers. Both bear a mysterious tattoo but exhibit no known cause of death. Their only connection to one another is a string of puzzling miracle cures. Her preliminary investigation points to a cult in the possession of the fabled panacea -- the substance that can cure all ills -- but that's impossible.

Laura finds herself unknowingly enmeshed in an ancient conflict between the secretive keepers of the panacea and the equally secretive and far more deadly group known only as 536, a brotherhood that fervently believes God intended for humanity to suffer, not be cured. Laura doesn't believe in the panacea, but that doesn't prevent the agents of 536 from trying to kill her.

A reclusive, terminally ill billionaire hires Laura to research the possibility of the panacea. The billionaire's own body guard, Rick Hayden, a mercenary who isn't who he pretends to be, has to keep her alive as they race to find the legendary panacea before the agents of 536 can destroy it.

"An excellently crafted tale that's not to be missed." -- Heather Graham, New York Times-bestselling author

"Complete with twists and turns and high adventure, this thriller will grip you to the end." -- Suspense Magazine

"[A] suspenseful paranormal thriller... an entertaining tale, underlined by a clear battle between good and evil." -- Publishers Weekly

"Complex, entertaining, smart... An intelligent, intriguing, fast-moving blend of science fiction and thriller." -- Kirkus Reviews

• We started tracking this book on December 23, 2015.
• This book was $12.99 when we started tracking it.
• The price of this book has changed 26 times in the past 3,326 days.
• The current price of this book is $1.99 last checked 4 hours ago.
• The lowest price to date was $1.99 last reached on January 30, 2025.
• This book has been $1.99 4 times since we started tracking it.
• The highest price to date was $12.99 last reached on December 23, 2015.
• This book has been $12.99 one time since we started tracking it.
• This book is currently at its lowest price since we started tracking it.

• Literature & Fiction

• Text-to-Speech: Disabled
• Lending: Disabled
• Print Length: 538 Pages
• File Size: 3,593 KB