Joseph is a young boy whose family has settled by the sea at Karekare during the 1890s. One day, unable to scamper about the rocky outcrops with his brothers due to a disability, Joseph discovers a dog washed up on the beach, injured and exhausted but still alive. Joseph's father reluctantly agrees that they may keep the dog until its wounds are healed but no longer. Joseph and his brothers set out to convince their father otherwise.
Dorothy Butler can only be described as a doyen of children's literature in New Zealand. She has published many, many popular works, including a series of stories about a wonderful brown bear called Barney. With the publication of Seadog, Dorothy continues a successful and longstanding partnership with illustrator Lyn Kreigler, bringing stories dating back to nineteenth century New Zealand to life for the current generation of children