Right: Judith beheading Holoferne, 1599.
Left: The conversion of Mary Magdalene, 1598.
I love Caravaggio but I never read too much about his life that was very difficult because of his temper.
At this site you can find good reproductions and his biography. I took this excerpt because it is important to understand his work:
"Caravaggio painted on the canvas without and previous drawing.