Complex sentence: Monks (aka Edward Leeford) is actually the criminally-inclined half-brother of Oliver Twist in Dickens's novel of the same name, but he hides his identity.
Split into simpler sentences: Monks (aka Edward Leeford) is a character in the novel "Oliver Twist" by Charles Dickens. He is actually the criminally-inclined half-brother of Oliver Twist, but he hides his identity.