Sure, it is acceptable. In a novel, the goal is to tell a story effectively. Ending a sentence with a preposition can be a tool to convey a character's voice, especially if the character is uneducated or from a particular dialect. It can also be used to create a certain rhythm in the prose. Consider a character in a hurry saying, 'Where are you going to?' The preposition at the end gives it a rushed, natural feel. So, in the context of a novel, it's a valid and useful device in a writer's toolkit.
Yes, it is often acceptable. In novels, the rules of grammar can be more flexible for the sake of style and natural flow of language. Many great novelists have ended sentences with prepositions to create a more conversational or informal tone, which can make the characters seem more real and relatable.
Well, it's not only acceptable but sometimes even preferred in novels. Fiction writing aims to mimic real - life speech and thought patterns. Ending a sentence with a preposition can add a sense of immediacy and authenticity. For example, 'That's the book I was looking for.' sounds much more natural than a more stilted construction that avoids ending with the preposition. It helps the narrative flow smoothly and keeps the reader engaged in the story rather than getting distracted by overly formal grammar.