Do you guys have any recommendations for books similar to “If we say goodbye” by Jasmine Little or a like the movie Mr. and Mrs. Smith?

I just finished If we say goodbye and I enjoyed it so much!! I recommend it for sure. It’s a very cute romance book with no smut!! I liked the movie and I wanted to see if there was like a book like that. If yall haven’t watched it, (spoiler alert) it’s basically a movie about a couple who marry each other and are secretly spies tasked to kill each other. They both think the other doesn’t love the other but once they find their true feelings they live a happy life ig. I’ll take any suggestions so please let me knowww!! 😭🙏