Suggest a meaningful book to read on my birthday

My birthday is coming up and I want to spend the day reading a really meaningful book from start to finish.

Looking for something around 300 pages (max 400) that I can finish in a day. Ideally something thought-provoking or emotionally impactful — a book that stays with you and feels special to read.

Open to any genre, but I usually enjoy character-driven literary fiction.

What would you recommend?