T'nT: Telzey & Trigger

From the back cover of the Baen first edition: "They're dynamite! - Telzey Amberdon is one of the most powerful zenotelepaths in the known galaxy. Trigger Argee is a crack shot, with reflexes that make lightning look lethargic, and also a top agent of the galaxy's Federation of the Hub. Separately, they have been making life miserable for human criminals, unfriendly aliens, and nefarious members of all species. But when a danger to the entire Hub civilization brought these two together, the galaxy would never be the same!"