Coming off the disappointing Brothers in Arms, I approached the companion in Miles Errant with some trepidation. Had read some reviews that it was better. And those reviews were right. This may be the best one in the series so far.
Mark really comes into his own as a character here, differentiating himself in as many ways as he can from his brother. He likes to eat more, does not like combat, and is much more analytic. Being a clone, he defines himself in terms of his progenitor, but by the end of the book he has worked through all that. Though he definitely seems to have more than his share of the bad luck between the two.
It will be interesting to see if Mark gets to play an ongoing role in the future books. The synopses are still all about Miles.
And Miles himself goes through some changes here, having ended up dead trying to rescue his "brother" early in the book. He comes back considerably weakened, but since he is pretty weak anyway this doesn't change his perspective much. He's getting better all the time at seducing women--even manages it as a particularly nasty looking convalescent.
This is one to look forward to in the series. I give it four stars, just because I don't hand out five stars easily. Matter of fact, I haven't done it yet.
I've been reading all these on my Nook, and rate it a very pleasant way to read. But I think we're going to get a Kindle Fire. We'll see what we think of it.