can anyone tell me the name of the book its based on?

Rating: 8/10 (16 January 2005)

whats the name of the book its based on? anyone know? really liked the movie but well confused, can anyone tell me the name of the novel its based on so i can read it and satisfy my burning questions about this great movie I'm confused about the role of frank the bunny, and whether Donnie actually had the ability to time travel... i watched the directors cut and didn't find it any better than the original but i do really like the soundtrack... its a shame such a talented actor (Donnie) went on to make day after tomorrow which in my opinion was a poor film... but thats a topic for another debate I'm just trying to fill 10 lines!! just want book title and/or explanations from anyone please... much thanks
stef.