Jock of the Bushveld by Sir Percy FitzPatrick
As mentioned by MacMac in the Watering Hole's Q&A
Published in 1907 the book became a classic amongst animal stories. It's the story of Jock, a bull terrier, whose owner was a transport rider in the rugged and colourful days of the Transvaal gold rush. The days when big game roamed the land and each sunrise had it's own adventure.
One of those must reads, take it with next time you go on holiday