Answer the following question: Generate a question about the following movie plot: The film takes place in Brooklyn, beginning near the conclusion of the Second World War. Reuven Malter is a middle-class Modern Orthodox Jewish teenager, and the son of David Malter, a college professor and dedicated Zionist. At a baseball game between their schools, Reuven meets Danny Saunders, another Jewish teenage boy. At first, the meeting is one of enmity since Danny accidentally injures Reuven's eye during the game; this results in Reuven wearing an eye patch for a good portion of the movie. Danny goes to visit Reuven at the hospital to apologize--both boys are surprised to learn that Danny already knows David Malter from the library--and the teens gradually become friends, despite their differing backgrounds. Danny is the eldest son of a Hasidic Rebbe, the dynastic leader of the Hasidic Jews in that neighborhood. However, Danny is somewhat distant from him. Danny has also been going to the nearby public library and reading books on psychology. He amazes Reuven with his ability to remember word-for-word what he has read. It turns out that David Malter has been showing him these books. Reuven and Danny also go to a Sabbath service in Danny's Hasidic community as Danny is eager for Reuven to meet his father. Danny's father approves of their friendship - however, Rebbe Saunders disapproves of Prof. Malter's writings, which doesn't surprise anyone. Rebbe Saunders also wishes for Danny to become a rabbi and to eventually succeed him in leading his Hasidic community in keeping with the tradition of several generations but Danny doesn't seem very eager to pursue this. Some time later, the boys begin attending Hirsch College, a Jewish university. While Reuven finds college life exciting and challenging, Danny finds it harder to adjust, especially in one of his psychology courses where his professor denounces Sigmund Freud whom Danny was fascinated by. During this time, World War II ends and Reuven takes Danny to his first movie. After the movie, a newsreel begins and broadcasts the horrors of the concentration...
Answer:
What does Prof. Malter become engrossed in the creation of?