Captain's PerilJohn Peel, Judith Reeves-Stevens, William ShatnerStar Trek, book 1

Characters in Captain's Peril

2 characters, main characters first.

Main characters

James T. Kirk
Also in Star Trek, Star Trek Adventures - Trek to Madworld, Star Trek - Mirror Universe - Spectre, Star Trek - The Eugenics Wars - The Rise and Fall of Khan Noonien Singh, Star Trek - The Prometheus Design, Killing Time, Star Trek Myriad Universes - Echoes and Refractions, Star Trek - Time for Yesterday, Avenger, Preserver
Jean-Luc Picard
Also in Star Trek - Mirror Universe - Spectre, Star Trek - Vulcan's Soul - Epiphany, The Death of Princes, The Hand of Kahless, Star Trek The Next Generation - Dyson Sphere, Federation