"Victory" is structurally more accessible than some of Conrads  other novels. The narrative technique does not obscure things as much as in some others. Second: the story can be read as a thriller and works well as such. Maybe most important: the hero is a positive guy. Heyst is an oddball, an outsider, but he is likable. He is no fallen angel like Kurtz, no contemptible fool like Almayer, no low life like the secret agent.
Joseph Conrad, born Jozef Teodor Konrad Korzeniowski, (1857-1924) was a Polish-born novelist who spent most of his adult life in Britain. He is regarded as one of the greatest English novelists, which is even more notable because he did not learn to speak English well until he was in his 20s. He is recognized as a master prose stylist.