Danger on the Vanguard

Something is happening to the shuttles which fly from habitat to habitat around the Vanguard. In this third book of the Colony Ship Vanguard series, Paul and Gretchen continue to find out more about their surroundings. Brinley, the Free Ranger they saved, helps them as strange dangers happen, and mysteries are unraveled.
Book 3 of the Colony Ship Vanguard series.