I need help to find credible sources of literary criticism on Fahrenheit 451. Does anyone know where I can find good essays?

There's a search engine, not sure you can access it at home, but libraries subscribe to it, called ProQuest, I think. You could have a librarian access it for you, or possibly one of the teachers here can access it at work. It has a number of good online sources which may be difficult to find in other searches, though the right word combination of search terms at www.google.com is always good.

There is a book called RAY BRADBURY'S FAHRENHEIT 451 (MODERN CRITICAL INTERPRETATIONS), edited by Harold Bloom (Chelsea House, 2001), which may be in your local library. If not, it is listed as being available from Amazon.com.