1. Coherent-State Representations. Preliminaries. Canonical Coherent States. Generalized Frames and Resolutions of Unity. Reproducing-Kernel Hilbert Spaces. Windowed Fourier Transforms. Wavelet Transforms. 2. Wavelet Algebras and Complex Structures. Introduction. Operational Calculus. Complex Structure. Complex Decomposition and Reconstruction. Appendix. 3. Frames and Lie Groups. Introduction. Klauder's Group-Frames. Perelomov's Homogeneous G-Frames. Onofri's Holomorphic G-Frames. The Rotation Group. The Harmonic Oscillator as a Contraction Limit. 4. Complex Spacetime. Introduction. Relativity, Phase Space and Quantization. Galilean Frames. Relativistic Frames. Geometry and Probability. The Non-Relativistic Limit. Notes. 5. Quantized Fields. Introduction. The Multivariate Analytic-Signal Transform. Axiomatic Field Theory and Particle Phase Spaces. Free Klein-Gordon Fields. Free Dirac Fields. Interpolating Particle Coherent States. Field Coherent States and Functional Integrals. Notes. 6. Further Developments. Holomorphic Gauge Theory. Windowed X-Ray Transforms: Wavelets Revisited. References. Index.