Una's The Crimson Shadow was not only an amazing Trek book, it was just a brilliant book.
That's great to hear.
I was amazed and moved by the quality and profoundness of
The Never-Ending Sacrifice, the first novel in my two decades of reading Trek that I would ever recommend notwithstanding the Star Trek label. If Ms McCormack has managed to accomplish this once more, I really hope that she actually stops writing Star Trek, moves beyond the media franchise tie-ins and finds well deserved success with her own original works.
And it looks like the consensus in this thread is that the series as a whole was uneven and at the very least to pick up
The Crimson Shadow which I shall do and I'll wait and see once I finish that one whether I'll pick up a couple more.
Thanks for all the feedback folks!