Not enough study material available for literature review

Pals, please advise me readings or any fruitful suggestion for literature review. I’m not finding enough criticism and material available to review and then compare and contrast with my own. What should I do now? I’m tired of going round and round in the libraries and bookstores. And I don’t find study material on internet reliable. I’m a PhD student of English literature and need to work on the renaissance era. Badly need help.