Mathilda Holiday: The Complete Series. Mathilda Holiday

Magic is real - and it's a bitch. When Mattie's twin sister Tillie goes missing, Mattie rushes across the country to help search for her - only to discover that Tillie has been living a double life as a mage. Hidden rooms, dangerous spells, and a powerful secret society soon pull Mattie and their friend Trevor into a war they never saw coming. The Auditors have operated in the shadows for centuries, manipulating magic and silencing anyone who stands in their way.
What begins as a desperate search for one missing sister quickly spirals into an all-out battle against an ancient organization with limitless resources and terrifying power. As allies join the fight - and others fall - Mattie, Tillie, and Trevor are forced to confront mind control, forbidden magic, betrayal, and the growing cost of resistance. Each victory brings them closer to the heart of the organization.
Each loss makes the stakes higher. And the magic the Auditors have been hoarding for centuries may be more dangerous than anyone imagined. This complete Mathilda Holiday collection includes all five books in the fast-paced urban fantasy series - a story of secret societies, dangerous magic, found family, and thirty-something heroes fighting back against impossible odds.