Star Trek: Vulcan's Soul
Star Trek: Vulcan's Soul is a trilogy of Pocket TOS novels, written by Josepha Sherman and Susan Shwartz, and published by Pocket Books between  and . They continue the story of Ambassador Spock's efforts of Unification.

Novels 
 Exodus
 
 Epiphany
 Omnibus edition (Science Fiction Book Club exclusive)

Background information 
 What became the Vulcan's Soul trilogy initially started out as one novel, akin to its predecessors,  and Vulcan's Heart. As the project grew larger, it expanded into two, and then three, books. It was further delayed by the development of , which introduced additional elements into the Romulan mythos – namely, the Remans. This change almost derailed the trilogy entirely – Shwartz noting that "[we] really wondered for awhile there if there would be any form of Vulcan's Soul." – but between the authors and Pocket editor John Ordover, it was finally approved and writing begun. ()

Vulcan's Soul