Challenger: New Earth #6 (Star Trek: The Original Series Book 94)

Far from the reaches of the Federation, the Starship Enterprise has been guiding the development of an obscure planet upon whose fate the future of the entire galaxy may now depend in this unforgettable Star Trek adventure.

As the crew of the Starfleet Enterprise’s time leading the colony on newly discovered planet comes to an end, they look forward to giving up control to another ship and crew. But when the new ship arrives in the midst of a deadly attack on the colony, it’s tragically destroyed. With the Starship Enterprise off fighting a new and powerful enemy that threatens the colony as well as its enemies, Commander Nick Keller, first officer and ranking survivor of the decimated crew, is marooned. He must find a way to complete his original mission and come to the aid of the Enterprise in what might be its most desperate hour.