Thanks, Charli. Sorry about the delay in approving your comment, but it was wrongly blocked as spam by Akismet. Good luck coming up with a subject for your Kindle e-book. I would just say, don’t overthink it. Pick something you are passionate about and go for it. Even if it doesn’t turn into a huge best-seller, you will learn a lot through doing it, and the next one will be much easier. You can also return to any e-book you have published on Kindle and edit it if you wish as well, so nothing has to be set in stone.