Books in Avalon Quest for Magic series

Emily, Kara, Adriane and their animal friends must retrieve the last remaining power crystals and assemble the mysterious puzzle that will open the gates to the home of all magic, Avalon. With time running out, each mage goes after a crystal unaware that the final pieces of the puzzle contain dangerous, dark magic. In order to use these crystals, each mage will have to bond with dark magic and face their deepest fears. Can the mages overcome the dark magic or will they turn to the darkness like their evil enemies the Dark Sorceress and the Spider Witch? The fate of Avalon now lies in the hands of the Dark Mage.