What does Lisa hill have to do with the book Bridge to Terabithia?

Lisa Christina Hill inspired Katherine Paterson to write her novel Bridge to Terabithia. In real life Lisa was friends with Katherine's son David Lord Paterson. The friendship depicted in the novel is very like the friendship David and Lisa had until Lisa was killed after being struck by lightning. Lisa's personality was alot like Leslie Burke's even though Bridge to Terabithia is a novel.