Usually I think of Edda as “The Edda,” or “The Prose Edda,” partially because I’m reading The Poetic Edda now, and it’s an easy way of keeping them segregated in my mind. Snorri’s Edda is one of the two (the other is The Poetic Edda) primary sources for Norse mythology. It’s an important work in its own right, but it should be stated that the Edda takes some focus to get through – it’s not as interesting to a casual, modern reader as some of the other books on Norse mythology I’ve collected, that present the material in a more storified form. That said, the Edda is an essential part of any serious (even if small) library of works on Norse mythology: if you’re trying to study the Norse pantheon even a little bit (as I am), you’ve got to get a good version of the Edda. If you just want to know a little more about Odin, Thor, Loki and their adventures, I’d probably get the Davidson book. You can’t really review Sturluson’s work (written almost a thousand years ago), you just have to work your way through it and appreciate it for what it is. As usual, I got the kindle edition, which was nice and cheap, and allowed me to add notes and highlights to the text.