'Emma and Pip cannot seem to get along. This shouldn't be a problem, and it wouldn't be a problem - if it weren't for the fact that Emma's Dad is getting married to Pip's Mum!
'For Dad's sake, Emma tries to keep the peace, until a book of spells and wishes finds its way into the household, and she accidentally becomes a witch in a secret ceremony intended to impart magical powers to Pip. Emma is horrified. She never wanted to be a witch, and there seem to be a lot of difficult responsibilities attached to the job.
'Pip and Emma find themselves working together to reverse the effects of the spell, but nothing they can come up which offers a solution to their problem. But now Emma has an advantage over Pip, and maybe it would be fun to put it to good use...'
Source: Publisher's blurb.