Grettis saga Ásmundarsonar (modern Icelandic pronunciation: [ˈkrɛhtɪs ˈsaːɣa ˈauːsˌmʏntarˌsɔːnar̥] , reconstructed Old Norse pronunciation: [ˈɡrɛtːɪs ˈsaɣa ˈɒːsˌmʊndarˌsɔnar]), also known as Grettla, Grettir's Saga or The Saga of Grettir the Strong, is one of the Icelanders' sagas. It details the life of Grettir Ásmundarson, a bellicose Icelandic outlaw, set in the 11th c.