The Demon, the Witch and the Teenage Vampire — Glenn Scrimshaw

Eloim and his siblings begin their search for a way to rescue their sister Polly who was taken by the Demon Alexia. With his new friend, the werewolf Prince Oliver, Eloim sets off to find a vampire witch who may be able to help them sneak into the demon realms.
But as usual, Eloim's plans don't run smoothly. Caught up in the plots of the still obsessed Demon Alexia, Eloim finds himself in a strange place, having to deal with something totally new...
A girlfriend.
The return of the stylish teenage vampire in his third adventure.