Review a mid-series book? Am I mad? Often the first book gets the most reviews, but I think it's worth commenting on later ones so people know whether they want to stay along for the ride.
The time and place
Most of the book takes place on planet Ithiss-Tor, the homeworld of the insectoid Ithtorians, who can disguise themselves as anyone. I assume the setting is far future or parallel universe.
The suspension of disbelief
There are all kinds of aliens, mostly bipedal. There’s AI and pretty high technology. Space navigation is done by a pilot and Jumper, a person who can access grimspace, the woobly hyperspace that ships go through to get to different stars and planets. I believe it’s what makes FTL possible. Jumpers tend to burn out and die with little or no warning.