Star Trek Timetrap (1988) Paperback Book No. 40

Made by Pocket Books! In a remote area of Federation space, the Enerprise picks up an urgent distress signal -- from a Klingon vessel! Tracing the S.O.S., the crew finds the Klingon cruiser Mauler, trapped in a dimensional storm of unprecedented power. Yet paradoxically, the ship refuses both the Enterprise's call and the offers of help.