How to get a 4 or 5 on the AP Literature exam?

I got a 3 on the AP Language exam last year. Therefore, passing AP Lit with only a 3 will be useless since all of the colleges I applied to give credit for one AP English exam and give more exemptions for a 4 or 5.

Last year, I felt that my weakness was the multiple choice part of the test, and this year I feel that I’m weakest with the essays. I was much better at the AP Lang essays since I really enjoyed the synthesis and argumentative essays and I feel that I’m not as great with analyzing literature.

How can I prepare for the exam? Last year I took two practice tests in my class and was very close to a 4 both times and I studied more after that but still only got a 3. Should I buy a prep book? If so, which one is the best?

Thank you!