In my opinion the entertaining potential of this story suffers significantly from the fact, that Stevenson dedicates two thirds of the book to the construction of a mystery that is actually not a mystery to anyone anymore.

When Stevenson dramatically reveals in the last third of the book that Hyde and Jekyll are one and the same person, that doesn't really come be a surprise to any contemporary reader.

Still I found the book was worth reading. Stevenson is a great story teller and I like his straight forward and unpretentious language.

It is also interesting to think about the many different possible interpretations of the Jekyll-Hyde-metaphor. The most straight forward reading might be among the lines, that it represents a fight between the morally good and evil elements in human nature.

But there is also a more psychological (although probably anachronistic) reading, that takes Jekyll as a poetic depiction of a person that is struggling with either schizophrenia or a bipolar disorder.

In my opinion it is especially this openness to interpretation, that makes Stevenson's book timeless in a way and thereby justifies it's place in world literature as well as in contemporary pop culture.