Answer
Humboldt's gift is a 1975 novel by Saul Bellow. The novel is set in Chicago and New York City in the 1960s and 1970s, and it follows the life of an elderly German-Jewish intellectual named Humboldt Fleisher. Humboldt is a brilliant scholar who has achieved great success in his field, but he is also a deeply troubled man who is haunted by his past.