when i was in the 9th grade i think i read a book called '50 great ghost stories'...it was a book based on true stories about ghosts, spirits coming for revenge, re-incarnation and supernatural events which took place in different places in england during the 16th till the 19th centuries...believe me it was sooo scary...the biggest mistake i did was to read it at night before going to sleep (at that time i thought that nothing could scare me so easily especially a ghost story book) and the result was i couldn't sleep at all at night for a whole month after that...i always had nightmares about those stories and felt if i opened my eyes...i would find some one from one of the stories beside my bed staring at me...it affected my studies also...