Shadow of Doubt. This title makes the readers wonder what is causing that shadow of doubt. Is it a character's past? A mystery in the present? It immediately hooks the audience into the thriller plot.
One good title could be 'The Darkening Shadow'. It gives a sense of something menacing approaching. Another could be 'Whispers in the Night' which implies a mystery and a sense of unease. And 'The Hidden Danger' is also great as it makes the reader wonder what the danger is that's hidden.
The Lost Island. Islands can be isolated and full of unknowns. The 'lost' part implies that there are things on this island that are waiting to be discovered, and in a thriller, those things are usually dangerous or mysterious.
Sure. 'The Vanishing Act' is a good one. It gives the impression that something or someone has disappeared mysteriously. 'The Shadowed Path' implies a journey filled with danger and mystery. And 'The Haunted Hour' creates a sense of spookiness and suspense.
One of the best horror thriller novels is 'The Shining' by Stephen King. It's set in an isolated hotel with a family as caretakers during the off - season. The slow build - up of supernatural events and the psychological decline of the main character, Jack, is truly terrifying. Another great one is 'Silence of the Lambs' by Thomas Harris. It combines the horror of a serial killer with the psychological cat - and - mouse game between FBI agent Clarice Starling and the brilliant but deranged Dr. Hannibal Lecter.
'Broken Hearts and Shattered Dreams: A Breakup'. This title clearly shows the emotional turmoil of a breakup with the mention of broken hearts and shattered dreams.
A good thriller story often has a looming threat. It could be a serial killer, a ticking time bomb, or a conspiracy. Also, use vivid descriptions to bring the scenes to life and make the readers feel like they're right in the middle of the danger.