This book is more 1960s than anything written or aired in the '60s. It's a pop-culture mavin's dream. Cox livens his story up with so many '60s touches, it'll really tickle your fancy if you grew up then - and probably if you didn't. Its numerous references include events from contemporaneous T.V. and movie fare such as James Bond, The Avengers, The Prisoner and Stanley Kubrick's 2001. There's even a backstory incident dropped in from another failed Gene Roddenberry pilot of the early 1970s, The Questar Tapes.
Picking up the ball T.V. dropped in 1968, Cox takes the characters from the original series' "Assignment: Earth" and gives them a whole new story to play in. That episode was intended as a pilot for a series all its own, and of course that pilot never took off. With any luck, Cox will continue more adventures with extraterrestrial secret agent Gary Seven and his Greenwich Village hippy-chick assistant, Roberta Lincoln - and Seven's other "female" sidekick, Isis the cat - and spin them off into the series they should have been on T.V. If so, he couldn't have gotten off to a better start than this entry in the Star Trek book series.
This time around, Seven's future colleague, Septos, sends a cry for help from his base deep undercover in Romulan space, where an especially vicious Romulan secret policewoman commander named Dellas has appropriated much of his superior alien technology for an attempt on the life of Mr. Spock that will destroy the future reunification of the Romulans and the Vulcans. In order to prevent this catastrophe, Seven, Roberta and Isis teleport into the Enterprise's time, taking Captain Kirk and his crew to Romulan space - where, if they're not careful, they'll end up causing an interplanetary war even without Dellas' clandestine machinations.
The characters are all brilliantly written, Seven and Roberta especially, without a false note to be found in the bunch. In addition to Cox's many pop-culture references are as many from not only the original Star Trek episodes, but several from the '80s and '90s movies and even The Next Generation.
Unbelievably, this gem is out of print. Hunt it down. Especially since Cox is taking the characters further now, with his Eugenics War series - tying Seven into the origin of Khan Noonien Singh.
A real feast for Trekkies and '60s kids, and even non-series fans will probably enjoy it.