I must admit something, I'm new in this genre, just recently attracted to it and trying to write a story with suspense genre. Just that I have some trouble in understanding the differences between suspense and thriller and mystery. Do they have differences?
Unlike other genres, which deal with certain subjects, M/S/T really deals with certain aligned writing techniques. These techniques are used broadly in romance, crime, espionage, adventure, horror, fantasy, history and science fiction literature. Some of the fiction they're used in is considered to be part of the 'genre', and some isn't. For this reason, I tend to think 'crime genre, but thriller technique'
, or 'romance genre, but suspense technique'. Other writers think of it the other way: 'Thriller genre with sci-fi
subject'. Horses for courses, I suppose.
Anyway, the differences between M/T/S are largely technical - since the subjects can overlap so much. Many stories feature multiple M/T/S techniques.
Mystery is all about creating tension by withholding information. This usually mystifies readers, challenging them to solve some sort of problem. Mysteries are often about crime or espionage, but can also extend to horror, fantasy and romance for example.
Suspense 'suspends' tension by anticipating the resolution of conflict, but then extending the conflict further and further. Suspense makes a lot of use of the
plot twist - where the reader
thinks that it's resolved, but hidden information comes to light. Suspense is a critical technique for all kinds of genres -- horror and romance perhaps being the biggest beneficiaries. But it also extends to crime, fantasy, SF and the soaps. Hitchcock often made movies about crime, horror and dark romance - and every one of them is soaked in suspense.
Thrillers heighten tension by elevating stakes, and then by setting a time limit - or sometimes it's an option limit - or both. Thrillers are often action-driven. The subject is often crime or espionage, but horror, fantasy and SF also have their share of thrillers too.
Stories can make use of more than one set of techniques, which confuses the genre question further.
The Bourne Identity, for instance is an action espionage story built around a mystery (Bourne's amnesia), and presented as a thriller.
Rear Window is a crime story built around a mystery and soaked in suspense.
Romance often makes use of suspense (e.g. does he love me) and mystery (e.g.
who is trying to keep us apart), but seldom uses thriller techniques - because the
action in thrillers competes with the
reaction in the romance. On the other hand, thrillers often make use of romance sub-plots to force the main character to choose between saving the love-interest or saving the world - so go figure.
Hope that this helps!