<P><B>In this spin-off series from My Sister the Vampire, a new set of twins will have readers howling with laughter</B></P><P>To their classmates, Daniel and Justin are identical twin brothers. But in fact they couldn't be more different. On their 13th birthday, one is destined to turn into a werewolf. This full moon is going to change everything. Will Riley and Debi find out the boys' secret? And what will happen to the band?