[kypro]

This seems a bit niche for a book? I mean, there might be a book out there with some relevant information in, but my guess is that the advice would be too generic to be particularly useful. The solution(s) probably depend on the nature of the business and the specific problems you're facing.

I think networking is the way to go here... If you live in a decent sized city you should find plenty of networking events for business owners. Alternatively you could reach out to people on Linkedin who might have some advice to share. When I was working on startups several years ago that's something I would do a lot. I would try to find people doing similar things successfully and send a message saying hi and explaining the situation - you'd be surprised how many people will happily talk to you for hours just to be helpful.