I was inspired to read Dr Jekyll and Mr Hyde on a walking tour of Edinburgh, where the guide pointed out Deacon Brodie's pub, named after a respected man who created a secret life of theft to support his debts which apparently inspired this very tale. It is the Scottish book in my mission to read a book from each country I visit this year. It is set in London, but Robert Louis Stevenson is Scottish so it counts. 
 It is much, much less scary/fun/interesting because we all know the twist already, which is a shame as I'd imagine it would immensely powerful if you didn't know. It is quite short, so it's not as in depth as you might expect, and told in a peculiar mix of reflections of an observer (the lawyer, Mr Utterson) and letters. So it's rather distant from the action. 
 It's interesting to read a novel this old and consider what has changed in fiction... and what hasn't.