A high-stakes treasure hunt…A twisted trail of murder…A secret one woman may die to discover… Number one New York Times bestselling author Iris Johansen last electrified readers with Dead Aim and No One to Trust. Now she offers a new pulse-pounding thriller that takes suspense writing to an all-new level: deep below the surface, where a ruthless killer strikes without warning, without mercy...and with the deadliest intent. Melis Nemid is treading in dangerous waters--and she’s about to be dragged under. As a marine researcher, Melis knows all too well the dangers that can lurk under even the calmest surfaces. But not even she can guess how deep the darkness runs. Only one oceanographer ever came close to discovering the deadly mystery that lies beneath the sea--and he seems to have disappeared from the face of the earth. Now Melis is the last one who knows the truth. And someone is determined that the truth will die with her. For what Melis knows about the deep-sea mystery is only part of a nightmarish past torn by violence. She thought she had put that past behind her when she arrived at her Caribbean island home to research dolphin behavior. But her peace--and her life--is about to be shattered by the arrival of a savage killer. Someone--for reasons unknown even to Melis--is cutting a path of destruction and death that leads directly to her.Only one man can save her--a man who claims to be a fellow oceanographer. He will seek to gain Melis’s trust, getting close to her secret and her life. But what this enigmatic man really wants, Melis may not discover until it’s too late. Because whoever is after her knows her nightmares intimately, and soon she will be forced to relive them all over again. Except for the final nightmare. The one she can’t possibly survive.

In this electrifying novel of suspense, #1 New York Times bestselling author Iris Johansen takes us deep below the surface, where a ruthless killer strikes without warning, without mercy—and with the deadliest intent. Marine researcher Melis Nemid is treading dangerous water—and she’s about to be dragged under. Melis knows something that has already caused one oceanographer to disappear from the face of the earth . . . and that’s only part of a past torn by violence and betrayal. She thought she had put that past behind her when she arrived at her Caribbean island home to research dolphin behavior. But Melis’s peace—and her life—are about to be shattered by a savage killer who is cutting a path of destruction and death that leads directly to her. Only one person can save her—a man who claims to be a fellow oceanographer. But what this enigmatic stranger really wants, Melis may not discover until it’s too late. Because whoever is after her knows her fears intimately. And soon Melis will be forced to relive them all over again. Except for the final nightmare—the one she cannot possibly survive.

In East Salem, the elite St. Adrian’s Academy is at the nexus of a satanic apocalypse—and the fatal tide is rising. When Hieronymus Bosch’s Garden of Earthly Delights is reunited with the pagans who commissioned it, a dark prophecy begins to unfold in East Salem, beginning with a savage double-murder by hellish creatures straight out of the painting itself. The lone survivor of the attack, a seventeen-year-old Brit, finds sanctuary at Tommy Gunderson’s home—and the place is soon surrounded by demons who seem to be biding their time . . . but for how long? Tommy’s pond has been contaminated with Provivilan—an insidious drug that could transform New York City’s children into an army of violence addicted murderers. But for an occult cabal in the upper echelons of Linz Pharmaceuticals, contaminating the water supply is just part of an ancient conspiracy against all of humankind. As the clouds gather, Tommy and Dani realize they must infiltrate Linz and St. Adrian’s to stop the dissemination of Provivilan. Even then, it could take a tangible eruption of the battle between angels and demons to save humanity from the supernatural evils that have been summoned to East Salem.

Tommy Gunderson and Dani Harris uncover a plan devised by occultist leaders at Saint Adrian's school and Linz Pharmaceuticals to deliver a drug into the water system that would transform children into murderers.

Three lives collide on an island off India: “An engrossing tale of caste and culture… introduces readers to a little-known world.”—Entertainment Weekly Off the easternmost coast of India, in the Bay of Bengal, lies the immense labyrinth of tiny islands known as the Sundarbans. For settlers here, life is extremely precarious. Attacks by tigers are common. Unrest and eviction are constant threats. At any moment, tidal floods may rise and surge over the land, leaving devastation in their wake. In this place of vengeful beauty, the lives of three people collide. Piya Roy is a marine biologist, of Indian descent but stubbornly American, in search of a rare, endangered river dolphin. Her journey begins with a disaster when she is thrown from a boat into crocodile-infested waters. Rescue comes in the form of a young, illiterate fisherman, Fokir. Although they have no language between them, they are powerfully drawn to each other, sharing an uncanny instinct for the ways of the sea. Piya engages Fokir to help with her research and finds a translator in Kanai Dutt, a businessman from Delhi whose idealistic aunt and uncle are longtime settlers in the Sundarbans. As the three launch into the elaborate backwaters, they are drawn unawares into the hidden undercurrents of this isolated world, where political turmoil exacts a personal toll as powerful as the ravaging tide. From the national bestselling author of Gun Island, The Hungry Tide was a winner of the Crossword Book Prize and a finalist for the Kiriyama Prize. “A great swirl of political, social, and environmental issues, presented through a story that’s full of romance, suspense, and poetry.”—The Washington Post “Masterful.”—Publishers Weekly (starred review)

"Magnificently researched, brilliantly written, Lethal Tides is immensely entertaining and reads like an action novel. Catherine Musemeche has brought to life the incredible work of the scientists and researchers who made such a remarkable contribution to America’s war effort in the Pacific theater during WWII.” —Admiral William H. McRaven (U.S. Navy, Ret.), #1 New York Times bestselling author of Make Your Bed and The Hero Code Lethal Tides tells the story of the virtually unknown Mary Sears, “the first oceanographer of the Navy,” whose groundbreaking oceanographic research led the U.S. to victory in the Pacific theater during World War II. In Lethal Tides, Catherine Musemeche weaves together science, biography, and military history in the compelling story of an unsung woman who had a dramatic effect on the U.S. Navy’s success against Japan in WWII, creating an intelligence-gathering juggernaut based on the new science of oceanography. When World War II began, the U.S. Navy was unprepared to enact its island-hopping strategy to reach Japan. Anticipating tides, planning for coral reefs, and preparing for enemy fire was new ground for them, and with lives at stake it was ground that had to be covered quickly. Mary Sears, a marine biologist, was the untapped talent they turned to, and she along with a team of quirky marine scientists were instrumental in turning the tide of the war in the United States’ favor. The Sears team analyzed ocean currents, made wave and tide predictions, identified zones of bioluminescence, mapped deep-water levels where submarines could hide and gathered information about the topography and surf conditions surrounding the Pacific islands and Japan. Sears was frequently called upon to make middle-of-the-night calculations for last-minute top-secret landing destinations and boldly predicted optimal landing times and locations for amphibious invasions. In supplying these crucial details, Sears and her team played a major role in averting catastrophes that plagued earlier amphibious landings, like the disastrous Tarawa, and cleared a path to Okinawa, the last major battle of World War II.

While the sea continues to offer him discoveries from its mysterious depths, such as a giant squid, a teenaged boy struggles to deal with the difficulties that come with the equally mysterious process of growing up.