Magical Expansion. Adventures in the Milky Way, #1

Emily Peterson is the Great Witch, the most powerful of them all. Even she has limits. Defeating the Great Dark Witch pushed magical essence, the remnants of good and evil magic, through space. Since neither can be killed, trapping him was the only option. Now that he's gone, a new evil threatens life on Earth. Emily must stop the SHADOW from reaching the planet. Emily thought defeating the shadow would be easy, just another day in the Milky Way, but there's a secret, and Emily knows there is more at risk.
The shadow is devouring everything it touches, and Emily can't ignore the people she helped create with the magic. If Emily can't destroy the shadow before it reaches Earth, it will devour the entire planet, destroying everything she's ever loved.