In reading challenges where you add books of your choice to a prompt, there are many who add not only the book they wish to use for themselves but also recs and ideas for others. If we could have a toggle or button of some sort so books put there as ideas don't affect your personal challenge that would be great. It doesn't have to be anything fancy, it can just be a checkbox or toggle button for if your using the book or just reccing it. That way the system only using the one you're personally using when completing the challenge.