Recently I had a spare evening, and had a rummage through my old books, to try to find something to read. I stumbled on this one, which I forgot I had in my collection, & finished it last night.
First of all, I think that William Shatner writes SF competently. What he does particularly well is imagine how things might be in the future, particularly with regard to robots/androids. Isaac Asimov would be proud of him! He really does have a vivid imagination, and comes up with lots of new ideas. His SF is snappy and action-packed.
Unfortunately, I thought the story itself was not quite so good. It's readable, certainly, but perhaps a little on the shallow side. In other words, a bit too much action and not enough philosophy was my impression.
Nonetheless, if this is Shatner's first attempt at SF, he should definitely stick at it. Just make the characters a bit deeper and less like cardboard cut-outs. I hope this is fair.