Valley of Monsters (Island of Fog #7)

Hal Franklin feels a need to get away from the village of Carter. 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.

The ISLAND OF FOG series
#1 Island of Fog
#2 Labyrinth of Fire
#3 Mountain of Whispers
#4 Lake of Spirits
#5 Roads of Madness
#6 Chamber of Ghosts
#7 Valley of Monsters
#8 and #9 - coming in 2014