Valley of Monsters (Island of Fog, Book 7)

With Miss Simone and the entire village of Carter disgruntled at the influx of virus survivors from Old Earth, Hal Franklin feels increasing pressure to get away for a while. He sets off with a few friends on a mission to find Chase and bring back the missing shapeshifter twins, Bo and Astrid Hammacher, who should have turned into sphinxes long ago and instead vanished without a trace. But Hal has an even stronger reason to get away, for werewolf blood courses through his veins. The seventh book in the ISLAND OF FOG series visits Miss Simone's childhood and brings home an important scientific breakthrough.