After the events of the previous year, the town of Grayson has quickly settled into its new routine. All of the residents now know about the secret organization called the Sentinel League, but few have a clue what secrets it has been protecting. Since their enemy has escaped, fourteen-year-old Adam McTaggart worries that Aggie's prediction is coming true - Larix is coming because he thinks Adam knows the location of the Heartstone But Adam doesn't know where the powerful Heartstone is currently hidden, nor does he have any clue. He's been assured that Larix is still overseas, but unanswered questions from the previous year keep resurfacing, causing him to doubt the wisdom of senior members in the League. Even the fun of watching Kevin and Mark annoy each other can't take his mind off these questions. As Adam and his friends try to find the answers they seek, they discover that it's just as difficult to figure out who is a friend as it is to figure out who is an enemy. Aeturnum is the second book in Scott Gelowitz's 'The Book of Adam' series, a science fiction adventure filled with mystery, humor and suspense.