What is the author's style in The Story of My Life by Helen Keller?

Despite the hardships Keller overcame, there is no sadness, self-pity, or bitterness in The Story of My Life. She willingly tells of her childhood fits and how angry she was at the time, but she relates these episodes with calm recollection. Her focus is on the people she loved and the wonderful experiences she had in the first twenty-two years of her life. She wistfully recalls moments spent in the orchard or up a tree. Remembering her summer at Cape Cod, she writes, "As I recall that visit North I am filled with wonder at the richness and variety of the experiences that cluster about it."