I've read a great deal of Freud's work (way back when) and also a good amount about Freud. But reading his work placed in chronological order, with a skilled student of Freud interpreting the most important sections was an eye-opener for me about the evolution of Freud's ideas. Worth a read if, like me, you weren't reading Freud in any particular order, or probably also if you are wanting to dive into Freud's work.