I'll Always Know What You Did Last Summer. Poster of the 2006 movie and cover of the 1973 book, I Know What You Did Last Summer
VS3
I Know What You Did Last Summer
Lois Duncan, 1973
movie vs book
Sylvain White, 2006

Several teenagers in a small-town in Colorado concoct a July 4th prank based on a frightening legend that goes awry when their friend ends up accidentally killed; however, the teens agree to keep their involvement a secret from the authorities, who continue to search for the man who apparently killed their friend. A year later the teenagers realize that they’re being stalked by someone who clearly intends on keeping the horrible legend alive by killing them off.