When getting to the climax of a story, or a very interesting part, the author can leave you with a cliffhanger. Often times, they do this to continue the adventure/s that they take you on through their imaginary world. At the end of a story when there are still questions to be answered, authors can stretch their series while also adding twists and unnoticed details to it.
Suspense and climax are definitely related, without suspense there is no real climax. Suspense is the build up in a plot, that always leads to a climax.
