@ mystical6604_vlogs what I personally did with my first book, was writing a book about the same thing I was interested in (reunions, marriage law, eight year, a combo of certain things is also possible,...). I chose certain topics because I knew that I could keep writing about it so that my book didn't suddenly stop because of writers block. So I think it's best if you write something you're interested in and keep writing about. If you want some book ideas just pm me, I have some that I don't plan on writing. Hope it helps you!