Like My Sister the Vampire, these twins will have you howling with laughter! To their classmates, Daniel and Justin are identical twin brothers. But in fact they couldn't be more different. On their thirteenth 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?

The second funny book in this warm series full of cute boys, friendships, and music The Packer twins are getting pretty good at this werewolf thing. The only trouble is, Daniel is the werewolf, but Justin is the one who's good at it. So Daniel concentrates on winning the Battle of the Bands with his group, In Sheep's Clothing. But when his lyrics go missing and the band's dreams of their first gig are shredded. And what will Debi do if she works out the song is about her? Meanwhile Justin totally does not want to win homecoming king. Stuck up cheerleader Mackenzie Barton is sure to get voted queen, and the only person Justin could dance with in front of everybody is Riley—but Riley doesn't even know he exists!

The third title in the brilliantly funny new series from the author of My Sister the Vampire It’s Halloween, but twins Daniel and Justin aren’t about to be spooked by ghosts and pumpkins – after all, one of them is a werewolf! But there’s still plenty to be scared about – like knowing when to hold your new girlfriend’s hand, and having to swap identities to keep your biggest family secret safe. Trick-or-treating has never been so confusing! Sink your teeth into Justin and Daniel's third wild adventure!

Justin and Daniel are in a spin. Justin's begun taking dance classes with his girlfriend, Riley. But if the football team find out, he's sure he'll be dead meat. Meanwhile, Daniel's really happy with Debi – but her dad is super-suspicious of him, and completely convinced that werewolves exist! Can Daniel throw him off the scent? One thing's for sure, the twins will need some fancy footwork to get out of this . . .