Long Boat Diplomacy by Matthew H. Ambrose (Long Boat Space #2)

Captain Brelling, Abishai, and the rest of the Long Boat Nai'a's crew have a conspiracy to investigate in the Lalande star system, but they have to survive the trip out of Tau Ceti and a high-speed star crossing first. Join the crew of this mighty ten-kilometer ship as they fight against an enigmatic organization determined to break the Long Boat Free Trade Syndicate and have the Nai'a for themselves.