What is the author's point of view in Shadow of a Bull?
I assume you mean the point of view of the story, referring to the type of narrator you have telling the story. First person point of view is when a character in the story tells it. Third person point of view is when someone outside the story tells it. The narrator is not a character in the story. A third-person narrator can be omniscient, knowing the thoughts and feelings of all the characters. He can also be third-person limited, where the narrator knows the thoughts and feelings of only one character.
Shadow of a Bull is told in third person limited. The narrator isn't a character in the story. It is limited because we know the thoughts and feelings of Manolo only as he struggles to make his decision whether to be a bullfighter following in his father's footsteps, or whether to become a doctor, which is what he wants for himself.