Freedom by Hal Colebatch and Jessica Q. Fox

H'char'n, a downed kzin hero, crashes on Earth during a Kamikaze-like attack and flees across the U.S., through the Appalachians, toward Niagara Falls. Pursued by an angry DHS agent who wants to kill this representative of a murderous species, and accompanied by a sensitive young woman who realizes the kzin have some redeeming qualities, it's a race against time as the noose tightens. Meanwhile, the duplicitous and greedy kzin Silver (last seen in the Man-Kzin series novel Treasure Planet) ...