Electra Brown: Life at the Shallow End: Book 1 by Helen Bailey
Electra's family is falling apart. Her dad's moving out, her mum's given in to her daytime TV addiction, and her little brother (aka The Little Runt) has just been caught shoplifting. Even the guinea-pig's gone mental.
And all Electra can think about is whether green eyeliner compliments or clashes with blue eyes.
Where can a girl turn in her hour of need? To her best friends, of course. Together, they think up a plan: persuading the class geek to stalk her dad seemed like a good idea at the time ...