The title of a book is critical. What advice would you give authors for selecting a hit title?

I would first recommend that an author search on Amazon for any titles they may want to use and check on the competition as well as how many times that title has been used in the past. If an author has a title that they are 100% committed to, and there are other books with the same title, then using a subtitle to define your book and separate your book’s genre or target audience can be effective. I’m a huge fan of original titles, even if they are a bit quirky or have a hidden message - something that has some intrigue.