The Lone Ranger: Vendetta by Howard Hopkins

The Masked Man in a brand-new adventure! From out of the past comes a mysterious killer systematically murdering anyone with a connection to the Masked Rider of the Plains former identity. When all signs point to Butch Cavendish, a man long dead, The Lone Ranger finds himself trapped in a deadly game of cat and mouse with the life of his faithful Indian companion hanging in the balance!