Machine derived contents note: Preface -- 1. A quick course in quantum mechanics -- 2. Self-adjoint, elliptic differential operators and eigen-function expansions -- 3. Quantisation of a static, scalar field theory -- 4. Two-point functions -- 5. The stress tensor and the Casimir effect -- 6. Quantum field theory in general space-times -- 7. Quantum field theory in an expanding universe -- 8. Some geometrical apparatus -- 9. Renormalisation of the stress tensor -- Conclusion -- Appendix -- Bibliography -- Index