Four 'good' girls meet in detention and are encouraged to take part in a school blogging competition together.

Ideas are few and far between but then they realise they have one BIG thing in common and the project is born - the '(O)ur (M) ums - (G)rrr' Blog.

As they pour out frustrations and niggles online, the blog gets more and more popular.

But will the mums find them out? Bang-on-trend story from a hugely popular and successful author.