It may be rather late for your project though if you're still interested in time travel and some of the relative theories try reading Paul Davies' "How To Build A Time Machine".. an excelent book making complex ideas easily digestable. I enjoyed reading it even though I'd previously read about each of the theories though it simplifies them excelently. It'll also make further reading of other books like Stephen Hawkings "Brief History Of Time" allot easier to understand and if you're going there I think you should seriously consider his "Univere in a Nutshell" (the illustrated hardcopy version).
Enjoy and good luck.
_Russ.