I think in terms of "Best Certification", you will need to find best certification for yourself. Some certification have more value in US/Indian market while other might have good value in EU region. In terms of content, it is very difficult to differentiate. This page (http://testinggeek.com/certification.asp) have information about some of the certification available to testers. As far as books are concern, I find core testing related books like Testing computer software, Art of software testing etc very helpful.
If you are talking about becoming a "test manager" in order to lead projects and people, I personally believe that there must also be an aptitude for management in order to be a Test Manager.
Having the technical knowledge of testing, and even a certification from some organization with regards to the testing world and/or a specific tool is nice...but not necessarily needed in order to be a Manager.
I have known several Test Managers who were not good at "managing". They have excellent technical skills, excellent domain knowledge, excellent knowledge on the testing industry, but were not good at the interpersonal skills that are required to manage people. And people from the aspect of a test team and working with other managers. I've moved some of these people out of a management role into a lead technical role...and most were tremendously happy to get rid of the management responsibilities.
There is no "certification" that I know of for management in general. I would also be wary of hiring someone to be a manager just because they felt they had a "certification". I look for relevant experience and aptitude for those skills.