LONDON, JACK. 1876-1916. War of the Classes. New York and London: Macmillan Company, 1905. 8vo. Maroon cloth with gilt to spine. Three pages of advertisements for works by London and others at back. Signed and inscribed: "Dear Martinez- In memory of many happy hours, affectionately yours, Jack London. Glen Ellen, Sept. 22, 1905." Condition: Good; fading/staining to spine, and ends of spine bumped, worn/frayed; scuffing to covers, stain/soiling on front; corners bumped/worn; light foxing throughout. Together with a photograph of Xavier Martinez painting a portrait of Jack London, who sits across from him in an outdoor setting. 3 1/4in x 5 1/2in. Tipped-on to thin paper, and inscribed in what appears to be Martinez's hand: "Jack London & xm. 1903 at Glen Ellen". Subjects also identified verso, and paper inscribed "Duplicate". Condition: overall good; left corner with crease, another slight crease/wrinkle at right. Martinez and London were friends through their connections with authors Herman Whitaker and George Sterling, the Bohemian Club, and the social circles that congregated at Coppa's Restaurant in San Francisco, the Piedmont/Oakland Hills, and Carmel. From the Family of Xavier Martinez (1869-1943), Elsie Whitaker Martinez (1890-1984), and Micaela Martinez DuCasse (1913-1989).