As books your target audience is already reading, comparable titles are a treasure trove of information for you to study. They are also used to design effective advertising campaigns.
These are the books and authors that your target audience is already reading. The product pages for these books are a treasure trove of useful information. You should study them closely. What does the cover look like? How is the book titled and described? What subcategories is the book in? How many pages is the book? What’s the book’s trim size and in which formats is it available and selling well? What do readers and professional reviewers have to say about the book? How does the book open? (If nonfiction, what’s included in the table of contents?)
At Bublish, we also use comparable titles and authors to guide our Amazon advertising. We optimize a book’s product page and then bid to have ads appear on the product pages of comparable titles. This means a book’s ads appear where readers are alreadly looking for or enjoying a similar reading experience, so they're in the book’s target audience. This ensures that we’re getting the right reader to an optimized product page that is designed to convert book browsers into book buyers.