Eric Maisel, Ph.D., is the author of more than 40 books in the areas of creativity, coaching, mental health, and cultural trends. He is a psychotherapist and creativity coach, and writes for Psychology Today and Professional Artist Magazine and presents workshops internationally.
Published in 1999, so very much focused on a trad pub model in which writing a) doesn't pay and b) goes hand in hand with depression and poor mental health. I've liked a couple of Maisel's other books, but I suggest giving this one a miss.
I found Living The Writer's Life to be a pretty good overall outlook on what you can expect when you choose to live the writer's life. He gives a good basic primer, though he more or less skims through the field. Like he looks at the writing life from an arms length view; not going into much detail on some of the things I'd have liked him to and spending much more time on the business side than I'd like. The business side is important, don't get me wrong, but if you aren't writing or are having difficulty writing, the business side won't be of much interest. If you are writing and have questions, then by all means this book does have some much needed pointers.
So are you depressed, have an addition, think out a hypothesis and never span it out to literature and then times that by twenty? Yep. You just may be a writer in dential. Sometimes we find a book and think it was written just for ourselves... This one was mine. I really connected with the author's interpretation of a writer's heart and mind... quotes and tips on how to focus all that negative energy into writing and getting published.