Enemy on the Vanguard

Inside the enormous Colony Ship Vanguard, tension and stress are everywhere. Strange and unknown things have been happening, and people are dying. What is causing this? Who is behind the threats? What is killing people and destroying equipment? What will happen to Brinley, Paul, and Gretchen as they face the enemy on the Vanguard?
Book 5 of the Colony Ship Vanguard series.