The Magicians' Guild (Black Magician Trilogy, #1)

The Magicians' Guild is the first fantasy novel in The Black Magician series by Trudi Canavan. Published in 2001, it is followed by The Novice (2002) and The High Lord (2003). The book tells the story of Sonea, a young girl from the slums, as she discovers her magical potential. When she hurls a stone through a magical barrier, accidentally injuring a magician behind it, Sonea finds herself on the run from the powerful Magicians' Guild. The magicians must find her before her uncontrolled and untrained powers kill her and destroy the city, as well as overcome Sonea's distrust and fear of the magicians and their Guild as they try to convince her to join their ranks.