Your publisher will likely send out an email when the book comes out. Don't expect much more from them. My advice, promote the book and use it to build up a mailing list. (I should have been building my list much earlier.)

I'm not sure about the intersection between technical books and traditional novelists. The only person I've known who tried it ended up going the self published route for the novel.

I am curious myself about writing a book for the general business audience through a traditional publisher.

Happy to answer more questions, I have details in my bio for contacting me.