I think that's because believable action is based on authenticity, and accuracy is very important to me. I always spend time researching my novels, exploring the customs and attitudes of the county I'm using for their setting.
Sidney SheldonI try to give both my heroes and villains an emotional dimensionality which provides the motivation for their actions.
Sidney SheldonWhen you write a movie, you have a hundred collaborators. But when you write a novel, it's yours.
Sidney Sheldon