Blake Hoena 
Horrible Hex [PDF ebook] 

It is really hard to be a good witch when your sisters are extra bad. Poor Linda catches her sisters hexing people again, and she knows she must stop them. But their hexes and spells are getting harder and harder to reverse. Thankfully Linda can count on her friends, knowing the Monster Heroes will help save the day. This early chapter book includes a glossary, discussion questions, and writing prompts.