Otho
His full name was Marcus Salvius Otho. Otho's reign was only a few months. Therefore, the book on Otho is short, much as the book on Galba had been.
Suetonius used a similar method to describe the life of Otho as he had used to describe the life of Galba. Suetonius describes Otho's family, and their history and nobility. And just as Suetonius had done with prior Caesars, he includes a list of omens regarding Otho's reign and assassination.
Suetonius spends most of the book describing the ascension of Otho, his assassination, and the other usual topics. Suetonius suggests that as soon as Otho ascended the throne, he started defending himself against competing claims to the throne.
According to Suetonius, Otho suffered a fate similar to the fate Galba had suffered. It was the loyalists of another aspiring emperor (in this case, the next emperor Vitellius) who wanted to kill him. Suetonius claims that one night Otho realized that he would soon be murdered. He contemplated suicide, but decided to sleep one more night before carrying out a suicide. That night he went to bed, with a dagger under his pillow. The next morning he woke up, and stabbed himself to death.
Read more about this topic: The Twelve Caesars, Constituent Works