The book "Sly Martin" by William Golding

At first glance, playing on the eternal theme of "man and the sea", perhaps Golding's most profound novel, where Robinson, quoting the allegory of Prometheus, hints that even the most despicable man tries to create God in himself. Stuck at the crossroads of the real and the fantastic, sanity and madness, love and hate, Martin the Clever creates his own purgatory in six days that lasted an instant.