I liked Lost Voices, although I felt conflicted about giving it four stars - the idea itself was haunting but the writing was not that great. I downgraded Lost Voices from a 5 star after a couple days because I felt like the book was great, but still flawed in some ways. 
 Now about Waking Storms...I only made it through this book because about halfway through, I started skimming in the vain hope that Dorian would die. Really, I've read hundreds of YA novels and I can only think of one or two other romantic pairings that made me angry enough to hope that the guy will just die in some gruesome way. You know the ending in the tribe's old cave? I wish Dorian had been in that pile. 
 There's nothing to say about him that other reviews haven't already pointed out, but I'll repeat some of those points here for the sake of clarification (SPOILERS AHEAD): 
 (view spoiler)[1. He tries to put a "I'm a 15 year old boy, I NEED to have sex! How dare you withhold sex from me because you're a mermaid and have a tail!" This kind of thing is bad enough in real life, but when she's a mermaid, it gets downright ridiculous. Oh, and then he turns this into an excuse to have sex with the first available girl who confirms that he has a girlfriend just so she can have sex with him. 
 2. Excuse me, but he blames Luce for turning into a mermaid after what she's experienced, and yet gets pissed off and shaken when Luce tries to gently tell him that she can see what HIS experiences of a filicidal mom? 
 3. I can give a small pass for the instant love considering that Luce is 14 and lonely. I can even give him a small pass since he's probably brain damaged from the mermaid song, his family just died, etc. HOWEVER, what about how he's needy, selfish, controlling, whiny, rude, emotionally manipulative, and so on? He would be a tiny bit more sympathetic if he actually thought about his dead family more than once or twice over the whole book, instead of constantly thinking about how Luce needs to be human so they can "be together" (translation: he can have sex with her). (hide spoiler)] 
 4. I can't even finish this list without getting pissed off all over again, but suffice to say that the character of Dorian ruined an otherwise decent book. 
 Nausicca was a much needed addition to the book since the plot otherwise never really solidified between the FBI, a bitchy "who's queen bee?" continuation of Anais-the-horrible from the last book, and Luce swimming around somewhat aimlessly. I thought it would have been interesting to see more of Ben Ellison and/or the FBI, but the scenes that did have them felt very two-dimensional, almost like a caricature. 
 The writing and the dialogue had me cringing through the book. I don't know if Porter switched editors or gave the editor less time, but while Lost Voices had some awkward writing, there were some terrible lines in Waking Storms that would be more suitable for a Disney sitcom. A perfect quote for this: "Like, seriously?"