Wonderful article in the Guardian by AS Byatt -
www.guardian.co.uk/books/2008/nov/15/little-dorritt-byatt
I reread a Dickens novel every year. Little Nell (The Old Curiosity Shop) is another gem; so is Barnaby Rudge, if you're looking for the less obvious ones.
To this day I reckon that opening scene in the churchyard in Great Expectations is probably the most frightening literature ever written.