Whilst some concepts of Thrillers are similar, there are thrillers of which differ tremendously. For example: An action thriller in comparison to a Romantic thriller
Romantic thrillers are a part of the genre of romantic suspense and deal largely with crime, intrigue, scandal, verging on scaring or thrilling the reader. Many thrillers involve murderers hunting down the protagonist, who meets a bodyguard of some sort. The two engage in a battle with the villain, fight for their lives and are saved in the nick of time, and through it all, fall in love. There is a double amount of suspense because not only is there romantic suspense (Will the guy get the girl?)
Action thrilleris awhere one or more heroes is thrust into a series of challenges that require physical feats, extended fights and frenetic chases.