Series information from Goodreads.

"To discover the truth behind her mother's mysterious death, a teen girl infiltrates a magical secret society claiming to be the descendants of King Arthur and his knights"--

After her mother dies in an accident, Bree Matthews wants nothing to do with her family memories or childhood home. A residential program for bright high schoolers at UNC-Chapel Hill seems like the perfect escape-- until Bree witnesses a magical attack her very first night on campus. A young mage who calls himself a 'Merlin' attempts-- and fails-- to wipe Bree's memory of everything she saw. His failure unlocks Bree's own unique magic and a buried memory with a hidden connection: the night her mother died, another Merlin was at the hospital. Now she'll do whatever it takes to find out the truth, even if that means infiltrating the Legendborn as one of their initiates. -- adapted from jacket