Forgotten World, book six in the Broken World series, continues following a group of survivors after a super-virus has decimated the human race and the dead have come back to claim it as their own... After the longest winter of her life, Vivian is thrilled to have Ginny back at her side. But joy soon turns to shock when the group learns that not only is Hope Springs in contact with other survivors, but that the CDC is working on a vaccine...