Not as good as the rest of the series
354449
Not as good as the rest of the series, and cannot really put my finger on why. Just sort of plodded along, instead of zipping along like the other books.
1353087
its probably my least favorite in the series. it still has its good parts and worth reading with the others but this one kind of drags on without much action
108343
Love love love this series but unfortunately this book fell flat. Not as humorous as the other ones, not as interesting as the other ones, main man not as hot as the other ones, and so on. This one felt like the author didn't really care this time around. I will still read this series but this one was a disappointment.
2757928
I was somewhat disappointed with this book.  The rest of the series was great but this one left me wanting more action.
3813525
The other books in the series were better. Main character and his humor where not in evidence as much as previous books.  Still it was a quick read and a different setting from normal.
2369151
Not as good as the other books in the series.  This one seemed to drag along.  I kinda lost interest.
3342334
I have read every one of these books and while this one was better than many of the recent ones, it was not the addicting funny story we used to get in this series. It was not bad, it was just not good, it was poor in comparison to those first 5-6 books in the series.  I will keep reading since there are some unfinished things that I want to see how it plays out but the humor and romance was pretty much missing.  I think the problem is that it was a pretty good "adventure" type book but that is NOT why we buy this series, we want that humor and quirky romance.  It was not here sadly

The couple of Sarita and Domitian was good but the romance was almost missing I felt.  The story was told with glacial slowness I felt and if I did not love this series so much I may not have finished it at one point BUT it does end up pretty nicely if rushed in comparison to the rest of the book.

Bottom Line:  The story kept your attention for most but not all of the book.  The mad scientist thing is really old but done well enough.  The humor and romance that used to be the mark of this series was almost nonexistent.  I started to give it 4 Stars but dropped it to 3 after considering all the things that we did not get to see in this book.  3 almost 4 Stars.
3384972
Not sure if it was the flashbacks or the constantly repeating struggle Ella and Quin had over who's fault it was that they weren't together, but this was not the best story in this series. I couldn't stand the flashbacks and when the story finally stayed in the present, the constant "it's my fault ... no it's my fault" stuff was dragged on a little too long. The other books in the series were much better done.
714256
Couldn't get into this one. I didn't enjoy it as much as the others in the series. The hero in this book also did far too much head lowering. To me it makes him a little weak and like all the others, is rather annoying.
2290441
Overall, I recommend this series and would give the series a higher rating in its entirety.  In my opinion, one of the strengths of this series is the characters and in this final volume several of the main characters were marginalized.  Additionally, I found this particular slice of the overall story arc lacking compared to the previous installments.

In summary, this is a good but not great book series and the concluding volume was  a bit of a let down.
4129052
This was okay, but not nearly as good as the other two books in the series.  Penelope was a little much for me and I didn't really buy them as a couple.  There were a lot of things happening in this book that continued the story in the series, so you should definitely read this one if you plan to continue the series.  Book 3 - Operation: Endurance is amazing!
4868952
Not as good as previous books in the series. The story was moving to slowly for me a lot of the time.
4340419
This was my least favorite of the series.  It just wasn't as much fun to read as the others.
877977
I love the series, but it slowed way down in book 4. It appears that there is another episode because of the way she left it with Cory still in the hinterlands. This episode is not the best one and I was a bit disappointed with the flow and content.
1131873
While I really enjoy this author and this very long series of books, this book was not nearly as good as previous ones. I knew a quarter of the way in that it wouldn't be finished and would leave me hanging and waiting.  I still love the characters but this book took forever to get to the action, and then was done. I like the introduction of new characters as well as a closer look at some of th he previously mentioned characters in former books, and I like that some of the recent storylines are coming together in this book. Not a terrible read, especially if you are hooked into this series,but certainly not the same quality as earlier books in the series.it just doesn't seem written with the same fire or intensity as previous books, and certainly isn't as captivating throughout. More like a means to an end.
3073944
This book of the series had way too much hanging out and little action in between. The story line stalled too. I don't like how the book ends in the middle of a scene. Probably a ploy to sell the next one in the series. I would buy it anyway hoping the next picks back up to the level of the first two. I basically like the story, it just got bogged down which is pretty typical for latter books in a series.
3653310
Not on par with the other books in the series.  It was like the story was being forced and didn't flow well.  I look forward to reading about the other characters that were introduced in this book.