Books like Shallows of night by Eric Van Lustbader

A Soviet nuclear submarine marked for defection slips into the Atlantic, sparking a high‑stakes pursuit by the United States and the Soviet Union in this tense Cold War thriller.

Jason Bourne, a deep‑cover operative with no memory, is rescued after a beachwreck and discovers a bank account embedded in his body that leads him to Switzerland and the truth about his past.

John le Carré’s Cold‑War spy thriller follows British agent Alec Leamas as he takes one last perilous assignment to outwit East German intelligence.

"I very much need to be dead." These are the chilling last words left by a man who had everything to live for but took his own life. In the void that remains stands his widow, FBI agent Jane Hawk, surrounded by questions destined to go unanswered unless she does what all the grief and fury inside her demand: Find the truth, no matter what. People of talent and accomplishment, people seemingly happy and sound of mind, have recently been committing suicide in surprising numbers. A disturbing pattern is beginning to emerge. Jane is determined to give up everything to find out why. And if that means going rogue and becoming America's Most Wanted, then so be it. Those arrayed against her are legion, and devoted to protecting something profoundly important-or terrifying-enough to exterminate any and all in their way. But Jane is as clever as these enemies are cold-blooded, as relentless as they are ruthless. And she is driven by a righteous rage they can never comprehend. Because it is born of love.

Court Gentry, known as The Gray Man, is a legendary assassin who moves from job to job, never leaving a trace. Facing lethal adversaries, he must prove that there is no gray area between killing for a living and killing to survive.

Super‑diplomat Raymond Havilland orchestrates the kidnapping of Jason Bourne’s wife to lure the ex‑operative out of retirement, setting in motion a Taiwanese plot to seize Hong Kong and provoke a confrontation between China and the West.

Theodora Lovelace wakes from a dream to find herself entangled with the legendary spy‑privateer Miles Winchester, whose double life threatens both their love and their reputations during a perilous night‑time campaign.

Kinsey Hollingsworth’s tropical escape turns deadly when she’s chased by gunfire and captured by the alluring spy Mitch Perovski, forcing her from pampered socialite to covert partner in a high‑stakes mission.