The Power of Six starts where I am Number Four left off with John Smith, Sam Goode and Number Six, being on the run from the police, and of course The Mogs.I actually give this book a 3.5 star rating (but I'll be nice and give it 4 stars on goodreads). I read a lot of people's reviews about this book before reading it myself. A lot of you said it was amazing, good, etc. Well to be honest, this book was rather disappointing.Firstly, from the start to about 150 pages in was somewhat slow but a lengthy start to where we finally see some real action. I've honestly NEVER read a book that has gone beyond 100 pages to interest the reader and digest into the story. Every time I picked up the book and after reading 5-10 pages I found myself yawning and just almost giving up on the book altogether. But, I didn't give up, I prayed it would get better. And it did.Secondly, We get introduced to Number Seven. I think it was mostly her story that what made it a slow start to the book because we don't see any real insight into her legacies, her interaction with her Cepan (who by the way, is in my opinion, was a ignorant b***h who left 7 to defend for herself) during the 100-or so pages. But we do see her develop one about halfway of the book. Through her story we also meet Ella, who I found to be more likeable than Seven, aswell as her friend Hector, who we also meet. One thing I can guarantee you is Ella's background story at the end is AMAZING. It will shock you I promise.John, Sam and Six have good dialogue and interaction throughout the story but there were things that the author put in there that were very confusing and didn't explain very well. All they had was one person say "Whoa, do you know what that was?" only for another to say "No idea", "Maybe". Like guys, I know investigative skills somewhat adds a bit of mystery to the books but what's more annoying is that mystery is NEVER SOLVED and how my thoughts are the same as the characters. For example, When John opens his Chest and him and Sam asks Six over and over what the things contain inside. There were like 6 or 7 things Six didn't know and only 3 or 4 of them were solved at the end and about two-thirds throughout the book. What about the others?! Honestly, It would have been nice if we could have learnt more about the contents in the Chest. Before anybody comments to object about Six's chest, we do learn that she never got to open hers but I cannot remember why. We also meet another Number, and "It" (not spoiling you with their sex or number) is rather a cheeky smart-arse and looking forward to reading more about them in Rise of Nine!Would I recommend this book? Sure, I would. But with caution because of the slow start :)