There are plenty of online resources to help with reading our next book, Fortune's Favorites by Colleen McCullough.
Aside from ancient sources, such as Plutarch (also here and here), Divus Julius by Suetonius, and Book 1 of Appian's Civil War, there are two exhaustive sites regarding Caesar:
- N.S. Gill at Ancient/Classical History at About.com: Articles on Gaius Julius Caesar and pages on this site with resources and biographies of Julius Caesar.
- Suzann Cross: Gaius Julius Caesar: The Last Dictator, A biography of Caesar and Rome, 100 - 44 B.C. This includes biographies of Caesar's contemporaries.
N.S. Gill also has Sulla - Lucius Cornelius Sulla (138-78 B.C.) and Pompey - Cn. Pompeius Magnus.
I'm sure there is more, and I'll blog it as I come across it.