Authors use elements of suspense and mystery to engage and captivate readers by creating tension, intrigue, and anticipation throughout the narrative. They often introduce enigmatic characters, ambiguous situations, and unexpected plot twists to keep readers guessing and eager to uncover the truth. By withholding key information, foreshadowing ominous events, and building a sense of unease, authors can draw readers into the story and compel them to continue reading in order to unravel the mysteries and solve the puzzles presented in the narrative. This sense of suspense and mystery not only maintains readers' interest but also encourages them to speculate, analyze clues, and form theories, thus making the reading experience more engaging and immersive.