1. Introduction -- What is psychological criminology? -- Defining crime and criminals -- Debates about the nature of crime and criminality -- Psychological theories of crime and criminality: an integrated model -- 2. Human nature -- The principles of evolution -- Evolution and behavior -- Crime-focused evolutionary approaches -- Offender-focused evolutionary approaches -- Conclusion and evaluation -- 3. Heredity -- A primer in behavioural genetics -- Heritability of criminality -- Variations in the heritability of criminality -- Beyond behavioral genetics: molecular genetics -- Conclusion and evaluation -- 4. The brain -- Basic brain structures and functions -- Psychophysiology and crime -- Biochemistry and crime -- Neuroanatomy and crime -- Neuro-environmental factors and crime -- Putting it together: neuropsychological theories of crime -- Conclusion and evaluation -- 5. Personality -- Trait approaches to personality -- The single-trait approach and crime -- The super-trait approach: Eysenck's three-factor theory of crime -- Antisocial personality disorder (APD) -- Conclusion and evaluation -- 6. Development -- The biological and environmental foundations of human development -- Developmental risk and protective factors for crime -- Psychosocial development and crime -- Criminal careers -- Conclusion and evaluation -- 7. Learning -- The science of behaviour -- Classical conditioning -- Operant conditioning -- Social learning -- Conclusion and evaluation -- 8. Cognition -- The cognitive revolution -- Social cognitive theory -- Offender decision-making -- Schemas and scripts -- Conclusion and evaluation -- 9. Situations -- What is a situation? -- Social psychology -- Environmental psychology -- Opportunity theories -- The person-situation interaction (again) -- Conclusion and evaluation -- 10. Conclusion -- The argument in a nutshell -- The strengths and limits of integration -- Implications for practice.