I have just finished reading the Wide Sargasso Sea
It was an interesting read. It was written in 1966, a bit later than most of the novels I read. It is a novel based on the Bertha character in Jane Eyre
It shows Bertha in a more sympathetic light than in the original novel. In Jane Eyre, Bertha is not given a voice, she is a peripheral character, of no importance but how her existance furthers the plot. But in Wide Sargasso Sea, she is shown to have had a hard life and sinks into her insanity without her noticing.
While it was a good read, I still prefer Jane Eyre :)