I love her books. Here is her web site: http://www.terabithia.com/
The similar-sounding Pettersson is a very common surname in Sweden.
"But it’s all right now.I learned my lesson well.You see you can’t please everyoneSo you got to please yourself."Rick Nelson, GardenParty
"It does not become me to make myself smaller than I am." (Edith Södergran 1891-1923)