From the back cover:
In Boomer, the crew of the Corpus Christi discovers a chilling fact: a Soviet Typhoon-class nuclear missile submarine is alive and well. Worse, it has three of its missiles and their warheads.
Information presented in this module includes:
Boomer is the dramatic climax to the Last Submarine trilogy and brings the series to a close with a daring assault over the polar ice.
One paragraph reviews of Space:1889 Referee\'s Screen, Boomer, Earth/Cybertech Sourcebook, and Challenge 37.