The White Giraffe Series: The Elephant's Tale. Book 4

The fourth book in the heart-warming White Giraffe series by Lauren St John, featuring the African adventures of Martine and her magical white giraffe. When a sinister stranger calls at Sawubona, Martine is in for a shock. He claims he's the rightful owner of the reserve and every animal in it, including the white giraffe. With just thirteen days to save her home, Martine and Ben stowaway on a plane to Namibia, where the key to the mystery lies.
But trouble follows them to the desert dunes. There, they uncover a plot to destroy a herd of rare elephants. And to rescue them, they need the help of the elephants themselves.