The Question and Answer section for I Am Malala is a great resource to ask questions, find answers, and discuss the novel.
Malala's skull had pressure: her brain was swelling and in order to make room for it they needed to remove some of her skull.
You have a lot of very generalized questions here. This is only a short answer space. Malala's purpose of the book was to describe her life and promote her cause for peace and education.
Malala often travels with her father when he meets up with fellow activists, who openly protest Fazlullah. As a result, she became a part of the group and began giving interviews. In this way, Malala found her voice.