Principles of Criminal Law in Queensland and Western Australia is a new text which aspires to engage students in the criminal law in Queensland and Western Australia by explaining and applying its fundamental principles. In both these jurisdictions the criminal law stems from the Griffith Code, which was enacted in 1899 in Queensland and in 1913 in Western Australia. While there have been dynamic changes to both Codes, the core principles in the 21st century remain identical to those that formed the basis of Griffith's original Code.