In this stand-alone sequel to “The Lost Island of Tamarind,” Aguiar continues the story of the Nelson family and their mysterious island. Thirteen-year-old Simon misses Tamarind, an invisible island accessible only through ophalla, a mysterious and powerful stone found only on the island. When outsiders from his world discover Tamarind, and greedily begin mining ophalla for the riches it offers, Tamarind is in danger of being destroyed. Simon and his sisters sail from their home in Bermuda and find their way to Tamarind. They are met with a series of clues, and only through solving the clues within an allotted time will Tamarind be saved. Readers seeking a story about the Latino culture will be disappointed, while those seeking a well-written mystery and fantasy adventure created by a Latina will be encouraged. Middle schoolers, especially boys, will enjoy Simon’s adventures as they read to the book’s satisfying conclusion. Recommended.