'Annals' was written by Tacitus .

tacitus

Tacitus is known as being a historian and Roman senator during the Roman Empire, there are several partial surviving works and writings of Tacitus left such as the Annals and the Histories.

The Roman historian Tacitus is the author of "Annals," a historical account of Rome from the death of Augustus to 70 AD. His work is a valuable source for understanding the political and social dynamics of the early Roman Empire.

I would say Suetonius who wrote the Twelve Caesars and Tacitus who wrote Annals and Histories.