Books in the Angel Blade series

Book 4 of the Angel Blade Fantasy Series. Nikka, Gideon and Amy have gone into hiding, protected from Lucifer's army as well as the angels that wish to find them. But when they are discovered by a rogue demon and Nikka's baby is in danger, the devil begins the final steps toward the end of days and the last apocalypse. Nikka must find and release the Harbingers -- four angels lost in captivity at the beginning of time - in order to stop Lucifer from destroying the world.