Don't do as I do - do as I say.
All my books are quite different. I win some readers with one book and sometimes lose them with the next, and win some new readers. If you are serious about being a writer - and making a living at it, you would be best to find a genre you enjoy working in, and stick with that genre, at least for some time. That way, your readers will know what to expect of you. Once you have established yourself in one genre, you can experiment with others, or write under a pen-name.