Interested in researching some part of Camus' life, but not sure where to start? "The Notebook on Albert Camus" from Baylor University might be a good first stop.
Here's another research approach: "The Albert Camus Critical Interpretation Homepage" from Paul M. Willenberg of Swarthmore College, has photos, a biography, and links to essays by and about Camus.
Did learning about Camus' life and work spark an interest in writing about existentialism? If so, take a look at this essay.
Perhaps your readings and research have sparked an interest in mythology. This Google.com directory on the subject will give you numerous ways to narrow your topic.