I currently have a Master's degree in the sciences from a top tier University and have published a handful of papers, but I'm unsure if I want to go through with a PhD. I used to want to end up in academia doing research and teaching, but I'm not as passionate about research and teaching as of late. However, I have a strong desire to publish a book or two in topics closely related to the field I'm in. My fear is that I either won't be able to publish a book or won't be taken seriously if I publish a book with only my Master's and no PhD. I'm curious what everyone's thoughts are on how much of a leg up having a PhD would give one over a Master's in terms of publishing a book and being taken seriously. If I end up deciding for sure that I don't want to do research or teaching, would it be worth it to complete the PhD just for the sake of using it to publish a book? Or would this be a waste of time?
I know there's no magic formula to publishing a successful science book, but any advice or thoughts would be appreciated as I'm feeling very stuck right now.