Who are Erec's parents? In the third book in the Erec Rex series, Erec is determined to answer the questions about his past. Meanwhile, the Substance is draining out of Upper Earth, so Erec must find a way to return the missing Substance in time, before all of Upper Earth becomes akin to the Nevervald. I really liked this book. It explores Oscar's character more, as well as unveils a little more about Erec's mysterious, forgotten past. I definitely recommend this series.