Melting Stones

This book is about Evvy and Rosethorn from the Circle of Magic series. After Briar, Daja, Tris and Sandry go to visit Sandry's relatives, Rosethorn and Evvy go to the Battle Islands (which used to be infested with pirates!) to investigate the dying trees. Turns out the island they are on is a valcano and it's going to explode and kill them all. Go figure. I really like this book, it's much better than I though it would be. The characters are realistic and entertaining. It would help if you read the other books in the series first. This is the tenth in the series.