The account of Julius Caesar's kidnapping and subsequent actions against his captors is primarily found in "Commentarii de Bello Gallico" (Commentaries on the Gallic War), written by Julius Caesar himself. In this work, he recounts his military campaigns and experiences during the Gallic Wars, including his experience of being captured by pirates.

Key Points from the Account:

• Kidnapping by Pirates: Caesar was kidnapped by Cilician pirates in 75 BCE. During his captivity, he reportedly maintained a confident demeanor, promising to have them crucified upon his release.
• Return and Revenge: After he was ransomed, he gathered a fleet, pursued the pirates, captured them, and fulfilled his promise by having them crucified.

References:

• "Commentarii de Bello Gallico": Specifically, this account is found in Book 1, where Caesar discusses his early experiences and captures during his rise to power. While the text itself is in Latin, various translations and commentaries are available.

Additional Sources:

Besides Caesar's own writings, historical analyses and biographies, such as "The Life of Julius Caesar" by Suetonius or "The Twelve Caesars", also provide context and details on Caesar's life, including his encounters with pirates.

If you are looking for detailed passages or specific translations, many editions of "Commentarii de Bello Gallico" include commentary and analysis that can provide further insight into this event.