Passion Flower by Jean Ure
A classic read from the acclaimed author Jean Ure. There's trouble ahead when Steph and Sam's father embarks on a spot of kidnapping.
Parents! First they're together, then they're apart. For Stephanie, a cool fourteen year old, and Samantha, her ten-year-old sister, being stuck in the middle of their parent's problems is just what they need. Not. When Dad decides that what the girls really need is a summer holiday with him in Brighton, they jump at the chance. No rules, no hassle, no worries. But things never turn out the way you think, and Steph and Sam soon discover there's a lot more to being a family than they thought...