OK. I know a lot of people are saying this already but I have to agree: I have some issues with this series being four average books when it could have been condensed into three amazing books. There... I SAID IT! I absolutely loved Dorothy Must Die and was incredibly excited to get my hands on the rest of the series. I kept giving it the benefit of the doubt and rooting for it to get better but things just kind of kept slipping downhill as the series progressed. The conundrum I have with this series is that I still was happy to see things unfold and I was satisfied with the final outcome even though I found the path getting there to be lacking. 
 The End of Oz did have some things working in its favor. For starters, from a narrative standpoint it was far stronger than Yellow Brick War which is definitely the weakest entry in the series. Another thing working in favor of The End of Oz is that we finally get Dorothy's POV! I wish we could have had her POV chapters throughout the whole series! I loved everything she said and how her mind worked. It's easy to forget that she wasn't just a bitchy magic addict. She rose to power because she was shrewd and cunning... and also vicious. (view spoiler)[ The big final battle with Amy and Dorothy was a bit underwhelming. I was over so fast that it didn't really have enough room to build. But Dorothy deciding to melt herself with the bucket of water was definitely a good creative choice for the series and a fitting end to its villain. (hide spoiler)] 
 There was also a happy ending for Nox and Amy. (No, that isn't a spoiler! I mean... obviously!) Their big kiss in The Wicked Will Rise was everything! I couldn't have been more excited. From then on I didn't really feel the "heat" between them. (view spoiler)[ Nox and Amy have sex for the first time. I found the telling to be respectful and realistic. Actually it was pretty adorable if I'm being honest! (hide spoiler)] Also, they really haven't known each other so long. What has it been? A few months? I mean, peril usually makes the heart grow fonder and all that but it still seems a bit soon to be declaring undying love. On the other hand, I wouldn't want to read about them being just so/so about their relationship. They need to be desperately in love because it makes me root for them even more! And I loved their HEA even if it was cheesy to the max. P.S. Also, isn't Nox immortal? They never really say anything about him not being immortal anymore. Should we just assume he's not anymore because (view spoiler)[ everything evil that Dorothy ever did to Oz was undone? (hide spoiler)] 
 Like I said, I was underwhelmed by the overall conclusion... until the last line of the book. Hot Damn! That was such an excellent final line in a book/series! Honestly, I think that one last line really sold it for me. If Danielle Paige hadn't included it I would have been filled with ennui and so disappointed that I stuck it out to the end. Luckily, she totally came through and saved the entire series with one sentence! 
 Regardless of the content of this review, I don't want to come off as if I hated the series and that it didn't have much to offer. It just would have benefitted from a good editor. If the fat was trimmed out and a little re-tooling done, books two, three, and four could have been combined into just two books. I think that would have truly been the key. The pacing lagged and nothing was happening for long spells because of this sense that they were being stretched into an extra book. However, Danielle Paige somehow made the whole thing worth it with one sentence. Now that is some effective story telling!