How far have you read into the Star trek novels? And to make a long story short...he no longer has that chip. To give you more info would require spoilers to novels after that series. If you want them just give the word. And I ,as well as others ,will fill you in.
I'm all the way up to 'The Body Electric' which should arrive in a few days.
I stopped reading TrekLit for a while, then came back about 2 years ago and ordered in a shit load of books. However, the A Time To... series was not available in the Netherlands anymore. Not complete anyway.