The Tulip Touch

Nobody wants to be around Tulip but her outlandish behaviour doesn't matter to Natalie. At first she finds Tulip exciting and she doesn't care that other people are upset by her pranks. But then Tulip's games become increasingly sinister, and Natalie realizes that Tulip is going too far.
Nobody wants Tulip in their gang. She skives off school, cheeks the teachers and makes herself unpopular with her classmates by telling awful lies. None of this matters to Natalie who finds Tulip exciting. At first she doesn't care that other peopleare upset and unnerved by Tulip's bizarre games, but as the games become increasingly sinister and dangerous, Natalie realises that Tulip is going too far, much too far, racing, in fact, to the novel's shocking ending.