Books in the Council of Calamity Trilogy series

Nothing ever happens on the Eckerly farm, where 15-year-old Alexa Flynn lives with her family. Then one day a strange, old woman appears to tell Alexa and her twin brother Michael that they possess an ancient and mystical power-the power of magic.When tragedy strikes, Alexa finds herself on a dangerous quest facing monsters, murderers, and beings of unspeakable power. As she races against time to save her family, the young sorceress must decide how far she is willing to go in order to realize her true power.