Roger and Rayleigh — Eiichiro Oda

In his effort to save Camie the mermaid from being sold to the highest bidder, Luffy's attack on an exalted Celestial Dragon has given the Navy the green light to send the Admirals in after him. But the Straw Hats get help from an unexpected source--a mysterious outlaw who knows all about Gold Roger, the original King of the Pirates!