What is "hag-seed"

Hag-Seed is a novel by Margaret Atwood, slated for publication in October 2016. A modern retelling of William Shakespeare's The Tempest, the novel centres on a theatre director named Felix who is exiled to teaching in a prison after losing his job with Makeshiweg Theatre, and begins to plot his revenge against those who wronged him.

The novel was commissioned by Random House as part of its Hogarth Shakespeare series of retellings of Shakespeare plays. Other authors participating in the series include Howard Jacobson, Anne Tyler, Jeanette Winterson, Tracy Chevalier, Jo Nesbø, Gillian Flynn and Edward St Aubyn.