This was another audiobook I tried as an experiment and it failed. These things happen more frequently with audio than other media because I take more risks on audio. The story was poor even for the juveniles at which it was aimed. I assumed from the behavior and language level of the characters that it was aimed at middle-graders, but it was juvenile even for them. My kids are just edging out of that zone and they would have had no interest whatsoever in this.
It didn't help that this was book sixth in a series, I admit. Things were definitely missing, so you cannot read any one of these, I'd guess, as a stand-alone, but that wasn't why I failed this one. I didn't realize it was a series when I grabbed it in haste (obviously!) off the library shelf. This because I don't judge a book by its cover, given that authors have very little to nothing whatsoever to do with designing their cover unless they self-publish, so I do not linger on it and missed the tiny '6' up there under the massive series title. I really must start paying more attention before I flip the book for the back cover blurb! I don't normally read series for the very reasons exemplified here. Judged by the amount of fluff in this book, all six volumes could have been contained within one volume and it would have remained rather slim!
The novel had poor science, and it was silly and ill-conceived, and it was simply not worth my time. The title says it all. It was volume six, but it was the seventh element? Not well-planned!