I just finished this novel and figured I'd post my thoughts. I wasn't sure if it was really appropriate to create a review thread since the book was published back in 1978 by Bantam Books. But review or not, I just completed the novel and it's always interesting reading novels from the 1970s as they only had the original series and animated series to draw from. In this story the Enterprise is sent to determine if a species of arachnids on a planet named Arachnae (yeah, I know, pretty obvious) are intelligent. Due to an unusual ion storm their star system is being pushed into Romulan space. If they are intelligent and request to remain in the Federation, apparently they would be permitted to be part of the Federation. To help them make that determination they pick up a revered exobiologist named Dr Katalya Tremain. The only problem is she has a deep bigotry against Vulcans, and she is supposed to head the team with Spock. Adding another complication, Dr. McCoy is deeply attracted to her, but he finds her bigotry distasteful to say the least. Of course there is immediate friction with Captain Kirk as well. Strengths include the treatment of the characters. Sky handles McCoy's character particularly well. While McCoy and Spock argue at the drop of a hat, he has a deep respect with Mr. Spock and while it might be easy for an author to have Dr. McCoy sympathize at least partly with Dr. Tremain, she appropriately writes his character as being deeply bothered by her reaction to Vulcans. A weakness is that there are other crewmembers on the Enterprise that apparently have a racism against Mr. Spock, something that seems out of character. She may have been drawing on Lt. Stiles from Balance of Terror, but it was my impression his bigotry was the exception and not as common as it appeared in Vulcan!. There is a scene at the end of the novel that reminds me a bit of TNG episode "The Enemy" but I won't say anymore in case anyone wants to read the novel (I don't want to give it away). Overall I found it to be a good novel. You have to read it keeping in mind the time it was written, before TMP was produced. The determination of the arachnid species was a bit of a surprise to me, something I was not expecting, and there is a pretty decent explanation of why Dr Tremain feels the way she does toward Vulcans and a pretty satisfying resolution. Finally, just as a note, I did read in Memory Alpha that Sky's story was originally considered a possible episode if Star Trek had been renewed for a 4th season, before being adapted as a novel. A book I'd recommend reading if anyone were looking at an early novel to read.