Circles in the Stream (Avalon Web of Magic)

Emily, Adriane, and Kara are all drawn to a secret place deep in the woods. It is much harder than it would be because Kara will not cooperate with the other two mages. There they discover a portal to another world through which strange and wondrous animals have emerged, searching desperately for the magic that will keep them alive. The animals are peaceful and good, but what follows them through the portal is pure evil. The girls have been chosen by magical beings called Fairimentals to protect the magical animals, though they do not know why. To save them and their world, the three girls must begin a quest to find the lost home of legendary magic, Avalon, or to perish trying.