Hidden Magic was part of a limited edition series (Magic Underground Anthologies) that was available until December 31, 2020.
You can no longer purchase a copy of Hidden Magic, but you can get Spell of Shadows & Light, which includes all three stories Melinda Kucsera wrote for the Magic Underground Anthologies (Hidden Magic, Wayward Magic, and Forgotten Magic) PLUS the action-packed conclusion, the novella Spell of Shadow & Light.
Magical Mayhem Press 