Binny for short - Hilary Mckay

Binny's life has been difficult since her father died and her dreadful old Aunt Violet disposed of her beloved dog, Max. Her world changed then, to a city flat with not enough space for her Mum, her big sister Clem and her small brother James. Definitely no room for a pet.
Then one day Aunt Violet dies, leaving a small cottage in Cornwall to Binny and her family. Binny finds herself in a new world once more, full of sunshine and freedom and Gareth, the enemy-next-door and the ideal companion for dangerous dares. But Max is still lost in the past, and it seems impossible that she'll ever find him again...