This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Just googling for "testing certification" reveals multiple sources for certification. Having said that, it might also make sense to read what respected authorities in the testing community are saying about certifications. For example, here's what James Bach thinks.