Book 4 is the extension past what was planned (I think) to be a 3 part series, except the series is doing so well that it made sense to extend it out to five or six books.
I don't have a problem with that. Except...
What Eli does in book 4 is at least as much as he did in the first three books. He takes down multiple transport and gun ships, he faces 2000 orkassi and comes away mostly unharmed, and he leads the comms team that brings the fleet back to the system.
All in one book. In the first three, Eli was a stealth fighter for the most part, and it worked really well. It's what made the series interesting and worth reading, but this is too much.
Like another reviewer said, it's like he's Rambo now. Yes, he does have help along the way, but it's too much.
As for the ending, i won't spoil it, but I was disappointed. Yes, it means there will be a book five, but I thought it was unnecessary to be honest.
I'm still giving this book a 5/5* because I did enjoy it, even as the level of incredulity increased. This is my favorite series so far from the author, but we'll see if that changes with book five.
5/5*