My Messed Up Life By Susin Nielsen

Violet is not impressed with her TV director dad: he’s decided to abandon his family in Vancouver to start over with a new younger wife in LA. To Violet, it’s like he’s traded his old life for a better one – complete with new and improved children. To make matters worse, her mom has taken up with a dorky new man called Dudley Wiener. 
Violet decides to take control. She needs a new stepfather who is perfect, charming and will show Dad what he’s missing.