Sweet Sleep (Children of Ankh series) (Volume 1)

This story is about a normal girl who's destined to be nothing less than extraordinary. One thousand years ago, procreation with mortals became illegal under, immortal law. Any suspected immortal offspring will be allowed to live until the age of sixteen. At this time, a Correction will be sent to erase their family line. The suspected immortal and their immediate family will be executed. If the partially immortal teen manages to survive their Correction, or they have impressed the Guardians of the in-between with their bravery, they may be granted a second chance as a sacrificial lamb for the greater good. They must join one of three clans of immortals living on earth. Clan Ankh, Clan Trinity or Clan Triad. They will then have the symbol of that clan branded into their flesh and with this mark, their souls will no longer be permitted through the hall of souls when they die. They must wait in the in-between for their clans to heal their mortal shells. Once they have reached the age of eighteen they will be sealed to their clan.