The Return (1996)

A crossover book, better-written than Shatner's earlier work, "The Ashes of Eden" (this was co-written with Judith and Garfield Reeves-Stevens, although Shatner typically avoids crediting them on the cover). This one features an implausible story in which Kirk is raised from the dead in Picard's time to help facilitate a Romulan-Borg alliance against the Federation. Picard and TNG crew intervenes, Kirk fights off his programming in the end, and all is well - except KIRK WON'T STAY DEAD! ( )

he couldn't let kirk die ( )

Shatner can't stand the idea that Kirk got killed off in the movie Star Trek-Generations -- and I uppose a lot of fans couldn't, either -- so he has the Romulans and the Borg resurrect him, and in doing so send him off to kill Jean-Luc Picard. (Guess Shatner can't stand the idea of Patrick Stewart running the Enterprise, either.) ( )