Into the shadow mist
(Book - Children's)

While on a field trip to Bokati Island with the mysterious Guardian Master Em, Plum must decide whether or not to reveal her own Guardian powers when an unseen force puts the entire ecosystem at risk.

"Plum has passed the first test necessary to remain at the Guardian Academy and now is a true Novice, training to use her magic in service of the Santipap Islands. Like her classmates, Plum has the ability to shape-shift into a fantastic creature, the mark of a Guardian. But unlike her classmates, Plum does not seem to have a Guardian power, at least not one that makes sense. Plum worries that she may be like another one of her classmates who had to leave the academy because she used unauthorized workarounds to pass a test. And Plum's next test is fast approaching: She and a few of her friends must journey to another island in the archipelago to use their magic in the field. Something is threatening the trees on Bokati Island, and Plum and her friends must help--but will Plum be able to use her magic and live up to being a Guardian?"--Kirkus Reviews.