According to Queeney.
The Life of Samuel Johnson LL. D. with marginal comments and markings from two copies annotated by Hester Lynch Thrale Piozzi
A Johnson Sampler.
Boswell's Life of Johnson: New Questions, New Answers
Dr. Johnson & Mr. Savage
James Boswell and His World.
Samuel Johnson: His Friends and Enemies.
The Personal History of Samuel Johnson