The ultimate goal of creating suspense with an unreliable narrator is to engage the reader in your story, by making them feel involved, invested, and challenged. To make a connection between the reader and the narrator, you can make them empathize, sympathize, or dislike them, depending on your purpose. Additionally, you should make the reader question their own assumptions, biases, and judgments by making them doubt, wonder, or reconsider what they know or believe. Moreover, you should ensure that the reader enjoys the process of discovering the truth by making it rewarding, satisfying, or surprising. To do this, you can provide the narrator with a compelling reason or motivation for being unreliable (e.g., a trauma, secret or goal). You can also give them a distinctive or relatable voice that appeals to the reader's emotions, senses, or humor. Finally, give the reader clues and questions that invite them to participate in the story by solving puzzles and finding patterns.