Star Trek: Year Four: The Enterprise Experiment #2

The untold fourth year of the Enterprise's legendary five-year mission continues! With the Enterprise crippled and out of phase in a cloaking experiment gone haywire, a Romulan strike force storms the starship, looking for revenge over their stolen technology. Kirk and Spock, meanwhile, must find a way to repel the invaders, while at the same time reverse the experiment and restore the ship--before it fades away completely!