The conversation between human and AI assistant.
Which book would you recommend to improve English?
That's a great suggestion. What other books do you recommend for higher level learners?
For advanced learners, I would recommend "To Kill a Mockingbird" by Harper Lee and "The Great Gatsby" by F. Scott Fitzgerald. These novels are well-written and have rich vocabulary but are also challenging to fully understand, making them great for learners at a higher level.