Preface. Acknowledgments. 1. Introduction. 2. Fiat Lux! 3. The Photon's Wavefunction. 4. A Box of Photons. 5. Let Matter Be! 6. Spontaneous Emission. 7. Macroscopic QED. 8. The Maser, the Laser, and their Cavity-QED Cousins. 9. Open Cavities. Appendix A: Perfect Cavity Modes. Appendix B: Perfect Cavity Boundary Conditions. Appendix C: Quaternions and Special Relativity. Appendix D: The Baker-Hausdorff Formula. Appendix E: Vectors and Vector Identities. Appendix F: The Good, the Bad, and the Ugly. References. Index.