The Rescued Puppy (Animal Stories #9) by Holly Webb

Twins Georgia and Adam can't wait to go on holiday to the seaside - especially as they're taking their lively puppy, Lucky, with them.

Lucky loves running along the beach, playing in the waves and digging in the sand. All these new things are even more fun than chasing squirrels! 
And Georgia and Adam are looking forward to taking him out on their own for the first time ever. But their walk along the cliffs turns out to be even more of an adventure than anyone could have imagined...

(Illustrated by Sophy Williams)