Hydroisomerisation of linear alkanes in the gasoline feed to their corresponding isomers is recently considered the most suitable petrol upgrading option, particularly due to environmental and economic concerns. Several catalysts have so far been reported to be associated with activity and stability challenges, the book therefore covers useful information based on most recent literature, on these catalysts and the prospects of metal(s) or sulphate modified molybdenum carbide – zirconia materials as potential replacement.