Under the Mulga follows Jim Gasteen's childhood adventures, marriage and his life-long love affair with the land, which saw him eventually become an unlikely champion of land management.

With a knack for storytelling, Jim Gasteen recounts classic tales of outback life—the bullockies, governesses and swaggies; the shearing, horse-breaking and fencing. His reminiscences tell of colourful characters, an unforgiving landscape, and a sense of community and camaraderie that makes Australian bush life unique.