“The final test is the deadliest.” That’s the ominous tagline on the cover of Graduation Day, the third and final book in Joelle Charbonneau’s The Testing trilogy. Independent Study, the sequel to 2013’s The Testing, hit shelves last month and debuted on The New York Times best-seller list at No. 8. Unfortunately, Graduation Day isn’t slated until June, but the good news? We’ve got an exclusive chapter excerpt to share today. Are you ready for the final test, Shelf Lifers?