In this seventh outing with Emily Windsnap, Emily's family, her best friend Shona and her boyfriend Aaron are headed to a tropical island for a relaxing vacation. Emily promises Shona, there will be absolutely no adventure, just plenty of fun and relaxation. It doesn't take long for Emily to go off on a sidetrip with Aaron leaving Shona left out. Shona can't resist catching up with the boat taking the others to Forgotten Island and when Emily sees her, she ends up in the water and they get caught up in a terrible current. This takes a lot out of them both, but adventure always seems to find Emily, and before she knows it, she ends up on the other side of a powerful waterfall on a forgotten island no one else can get to. There is a situation that Emily has to help with that upsets both Shona and Aaron. This book has so much angst wrapped up in a short story. There are tested friendships, danger, young love, fantasy, adventure, and mystery. The way these three friends handle all this shows that they are just kids, but sometimes need to step up to make the right decision. This is another great adventure in this series to interest middle grades readers.