Titles in The Set :

The School for Wicked Witches 
Wicked Never Waits 
Wicked On The Wind

Description :

The School for Wicked Witches 
In Oz, most girls and boys with magical powers are sent from the north, south, east and west to renowned witch academies, where they are elevated and taught all the finer ways to be a responsible witch. But if you misbehave? Or are thought to harbour darker magic? You're sent to the equivalent of witch reform school – The School for Wicked Witches. ONLY! Once you get there, you find that the witches running it are so powerful that they've managed to trick the rest of the outside world. Yes, it looks to outside like they are taming the wickedness out of the witches ... but in truth, the school is run by wicked witches (who, incidentally, don't see themselves as wicked at all ... although some of them really are.)

Wicked Never Waits 
After making her escape from The School for Wicked Witches, Ava has realized that it might be the right place for her, after all. But her return isn't triumphant - if anything, she's more behind than ever. When things start to go very wrong at the school, Ava discovers she may be able to save the day ... but only if she pairs up with Tinabella, her friend-turned-enemy. What's a young witch to do?

Wicked On The Wind
Ava hasn't found Tinabella to be the easiest roommate to get along with. She's sneaky. She's popular. And she bends the rules a lot when it comes to magic.
Still, Ava never asked for Tinabella to be banished to a tower, trapped by a strange spell. And when the wickedest witch of them all attacks the School for Wicked Witches, trapping all the teachers within an enormous twister, Ava knows that it's better to have Tinabella by her side than to keep her locked away.