I have to disagree on De vita Caesarum:
The Twelve Caesars is considered very significant in antiquity and remains a main source on Roman history. The book discusses the significant and critical period of the
Principate from the end of the
Republic to the reign of
Domitian; comparisons are often made with
Tacitus whose surviving works document a similar period.
Critical approaches: Reliability
Suetonius used the imperial archives to research eyewitness accounts, information, and other evidence to produce the book.
However, critics say the book is founded on gossip and citations of historians who had lived in the time of the early emperors, rather than on primary sources of that time. The book can be described as very racy, packed with gossip, dramatic and sometimes amusing. There are times the author subjectively expresses his opinion and knowledge.
Though he was never a senator, Suetonius took the side of the Senate in most conflicts with the princeps, as well as the senators' views of the emperor. This resulted in biases, both conscious and unconscious. Suetonius lost access to the official archives shortly after beginning his work. He was forced to rely on second-hand accounts when it came to Claudius (with the exception of Augustus' letters which had been gathered earlier) and does not quote the emperor.
Despite this, it provides valuable information on the heritage, personal habits, physical appearance, lives and political careers of the first Roman Emperors. It mentions details that other sources do not. For example, Suetonius is the main source on the life of
Caligula, his uncle
Claudius, and the heritage of
Vespasian (the relevant sections of the
Annals by his contemporary Tacitus being lost). Suetonius made a reference in this work to "Chrestus", which may refer to "
Christ". During the book on Nero, Suetonius mentions a sect known as the Christians (see
Historicity of Jesus). Like many of his contemporaries, Suetonius took omens seriously and carefully includes reports of omens portending Imperial births, accessions and deaths. (Quoted from Wikipedia Suetonius entry)
And yes, I read it too.