One popular one could be 'The Girl on the Train' which you might be able to find for free on certain e - book sharing platforms. It has elements of mystery and a complex romantic sub - plot.
'Gone Girl' is also quite well - known. It's a thriller with a strong romantic relationship at its core. You can check some free e - book libraries. Sometimes, they offer this book for free for a limited time. The twists and turns in the relationship between the main characters add to the suspense.
There is 'Rebecca' which is an older but very engaging romantic suspense novel. It's often available for free on sites like ManyBooks. The relationship between the new wife and the memory of the first wife, Rebecca, creates a great deal of suspense and there are elements of a complex romantic relationship throughout the story.
One popular online romantic suspense novel is 'The Hating Game' by Sally Thorne. It combines the elements of romance and suspense very well. The relationship between the two main characters is full of tension and the plot has some unexpected twists.
'Gone Girl' also falls into this category to some extent. It's a well - known novel that combines a complex relationship story with a suspenseful plot. You may be able to get it for free through some digital lending platforms. The characters' motives and actions are full of mystery, making it a great read.
The Adventures of Sherlock Holmes by Arthur Conan Doyle is often available for free online. It's a classic in the suspense genre. Another one could be 'The Strange Case of Dr. Jekyll and Mr. Hyde' by Robert Louis Stevenson.
A more modern example could be some of the free short stories on Wattpad. While not as well - known as the classics, there are many up - and - coming writers on the platform creating engaging romantic stories. For instance, some users write contemporary love stories set in modern cities, with relatable characters and interesting plot twists, and these are all available for free on Wattpad.
There's 'Rebecca' by Daphne du Maurier. It's an older classic that combines elements of mystery and a sort of dark romance. It can be found for free on Project Gutenberg. Also, some works by Mary Higgins Clark often blend suspense and romance, and you might be able to find some of her novels for free on e - book platforms.
One popular romantic suspense novel is 'The Silent Patient' by Alex Michaelides. It combines a thrilling mystery with a complex relationship between the characters. Another is 'Gone Girl' by Gillian Flynn, which keeps readers on the edge of their seats with its twists and turns in both the mystery and the relationship aspect. 'The Girl on the Train' by Paula Hawkins is also well - known, where the narrator's unreliable memory adds to the suspense and the romantic undertones.
One popular one is 'The Vampire Diaries' which has been available in various online forms for free at times. It has a great mix of vampire lore, romance, and drama. Another is 'Twilight' fan - fictions that can be found freely online. These often take the basic concept of 'Twilight' and add their own unique twists to the paranormal romance.
There is 'Aag Ka Darya' which has some romantic undertones within its broader narrative. 'Basti' is also a well - known work that contains elements of love and relationships. These novels can often be found on websites that specialize in Urdu literature or through searches on major search engines.
'Pride and Prejudice' in Urdu translation can also be considered a romantic novel that might be available for free online. The story of Elizabeth and Mr. Darcy translated into Urdu has a charm of its own. Also, novels by Ashfaq Ahmed, like some of his works that have romantic themes, can be found on certain Urdu literature websites for free.
A lesser - known but interesting free online romantic thriller is 'The Silent Wife'. It tells a story of a marriage on the verge of collapse with a lot of psychological thrills. 'In the Woods' by Tana French also has elements of romance and is a great thriller. You can try to find these on e - book sharing platforms or by simply googling their names along with 'free online version'.