The Dover edition is a nineteenth century translation by SW Dyde. The OUP edition is a mid-twentieth century translation by TM Knox. There is also a more recent Cambridge edition that has revised Knox. My view is that the first Dyde translation is readable and relatively jargon-free and even with some additions of Hegel's students from posthumous German editions, it is a more focused read than the others.
The content of the Philosophy of Right is 'objective mind', by which Hegel means legal institutions and the state in its internal and external relations. He writes from the standpoint of seeing a historical rationale in positive social arrangements. This is expressed in the famous 'what is real is rational' remark in the introduction. Hegel of course is criticised for not contesting social arrangements, though this is not entirely fair.
The book is only part of a larger system, though it can be read alone. It is a good introduction to his thinking for those with some background in social or legal studies. To my mind though, the best introduction to those coming to Hegel for the first time is the introductory chapters to
Hegel's Encyclopaedia Logic, reproduced in Weiss's 'Hegel: the Essential Writings'. Hegel remains one of the world's great philosophers, but expect to have to struggle with both his language and the concentrated power of his thought.