Rating: 1/5 
 ***Minor spoilers*** 
 Rogue Wave follows both Serafina and Neela on their journey to recover their talismans. After visiting a vitrina who was able to tell them what three of the six talismans were, they split up. Serafina begins her search for a sapphire necklace, and Neela begins her search for a moonstone. Serafina returns to her home waters and finds that the palace is completely deserted and her mother is dead, but there are rumours that her uncle is returning. Here she meets the Black Fin Resistance, who are pretty much the only backup that Serafina can hope for. On the other hand, Neela returns home to the palace in Matali but upon telling her story to her parents, she is deemed crazy and is locked up in her room until the doctor can "fix" her. Along the way they discover that somehow, Traho knows what the talismans are and he is searching vigorously for them. They need to find the talismans first to prevent whatever Traho is planning. 
 I was extremely disappointed with this book. I know I didn't like the first book all that much, but I was hoping that this one would improve. I suppose I was drawn in by the pretty cover (I try so hard not to be, but sometimes I can't help myself) but it wasn't really worth it. Unfortunately I wasn't very interested in the story being told, so I found it extremely, extremely boring at times. I will say, however, this one felt a lot less silly than the first book in terms of the vocabulary, but that didn't make up for the boredom I experienced while reading this. 
 Unlike from what I remember of the first book, there were a lot of twists and turns in this one. I saw some of them coming, and I didn't particularly enjoy some of them, but they were there nonetheless. I wasn't a big fan of how Mahdi returned to the story, and I must say that his story arc was extremely predictable and not very entertaining in my opinion. There was another big reveal (view spoiler)[ with Serafina's uncle (hide spoiler)] that I saw coming from a mile away, and it was also easy to predict that (view spoiler)[ Lucia was Sera's uncles' daughter (hide spoiler)]. There was a final twist at the end that I didn't really see coming and surprised me, but the manner in which it was revealed (view spoiler)[ was pretty much the same as the reveal about Tom Riddle in Harry Potter. You know, the one where they rearrange the letters of Tom Marvolo Riddle into I Am Lord Voldemort? This was pretty much the same... Mfeme's name rearranged into something like "I Am Orfeo, Fear Me". Just for that the reveal was pretty meh. (hide spoiler)]. 
 Overall, I wasn't too impressed with this book. The characters fell flat for me and the story didn't interest me which just made me bored the entire time. There were a lot of "surprises" in the book but only two reveals actually surprised me and I wasn't too impressed with either one. I had hoped this one would be better than the first, which I didn't like that much, but it really wasn't. I wouldn't really recommend this to you if you're looking for a mermaid fantasy. I read Of Poseidon and I found that one much better, so if you're interested in the whole mermaid thing, I'd check that book out first.