Can anyone recommend a good book or website for managers?

I'm hoping someone can either give me some advice, recommend a website or maybe a good book. I'm a manager for a small clinic and I find it very difficult to perform my responsibilities due to the owners philosophy on how they want their business run. The problem for me is that they don't want any of the employees to be accountable or reprimanded for anything! And, I find myself tearing my hair out. I feel undermined by the owners and it's difficult to retain my credibility with the front office staff. Productivity and attention to detail are lacking and their silly trivial errors cause me major grief.