Electromagnetics

1. Time-Harmonic Electromagnetic Fields (Author: R. F. Harrington).
2. Introduction to Electrodynamics (Author: D. J. Griffiths). 
3. Advanced Engineering Electromagnetics (Author: C. A. Balanis). A good companion for Time-Harmonic Electromagnetic Fields.
4. Classical Electrodynamics (Author: J. D. Jackson).
5. Classical Electrodynamics (Authors: Kimball Milton and Julian Schwinger).
6.  Fields and Waves (Author: D. K. Cheng).
7. Electromagnetic Waves and Radiating Systems (Authors: E. C. Jordan and K. G.Balmain).
8. Electromagnetics (Authors: J. D. Kraus and K. R. Carver).
9. The Feynman Lectures on Physics: Vol. 2 for electromagnetics and optics. Read at https://feynmanlectures.caltech.edu/
10. Electrodynamics of Continuous Media (Authors: Landau, Lifshitz, and Pitaevskii).
11. The Classical Theory of Fields (Authors: L. D. Landau and E. M. Lifshitz).
12. Electromagnetics (Author: E. J. Rothwell).
13. Electromagnetic Theory (Author: J. A. Stratton).
14. Electromagnetic Radiation, Scattering and Diffraction (Authors: P. H. Pathak and R. J Burkholder).
15. Theory of Electromagnetic Wave Propagation (Author: C. H. Papas).
16. Electromagnetic Waves (Author: S. A. Schelkunoff).
17. Electromagnetic Wave Theory (Author: J. A. Kong).
18. Elements of Electromagnetics (Author: M. N. O. Sadiku).
19. Field Theory of Guided Waves (Author: R. E. Collin).
20. Applied Electromagnetics (Authors: F. Ulaby and U. Ravaioli).
21. Lectures on Electromagnetic Field Theory (These are the lecture notes by Prof. W. C. Chew). Source: https://engineering.purdue.edu/wcchew/ece604f20/EMFTAll.pdf
22. Engineering Electromagnetics (Authors: W. H. Hyat, J. A. Buck, and M. J. Akhtar).

Microwave Engineering

1. Microwave Engineering (Author: D. M. Pozar).
2. Foundation of Microwave Engineering (Author: R. E. Collin).
3. Microwave and RF Design: Vol. 1 to Vol. 5 (Author: M. Steer).
4. Principles of RF and Microwave Designs (Author: M. A. Morgan).
5. Microwave Transistor Amplifiers (Author: G. Gonzalez).

Electromagnetic Metamaterials and Metasurfaces

1. Metamaterials: Physics and Engineering Explorations (Authors: N. Engheta and R. W. Ziolkowski).
2. Negative-Refraction Metamaterials (Authors: G. V. Eleftheriades and K. G. Balmain).
3. Electromagnetic Metamaterials: Transmission Line Theory and Microwave Applications (Authors: C. Caloz and T. Itoh).
4.  Metamaterials with Negative parameters (Authors: R. Marques, F. Martin, and M. Sorolla).
5. Physics and Applications of Negative Refractive Index Materials (Authors: S. A. Ramakrishna and T. M. Grzegorczyk).
6. Dielectric Metamaterials: Fundamental, Designs and Applications (Authors: I. Brener, S. Liu, I. Staude, J. Valentine, and C. Holloway).
7. Surface Electromagnetics (Editors: F. Yang and Yahya Rahmat-Samii).
8. Electromagnetic Metasurfaces: Theory and Applications (Authors: K. Achouro and C. Caloz).
9. An Introduction to Metamaterials and Nanophotonics (Authors: C. Simovski and S. Tretyakov).

Electronics and Communication

1. Solid State Electronic Devices (Authors: B. G. Streetman and S. K. Banerjee).
2. Electronic Devices and Circuit Theory (Authors: R. L. Boylestad and L. Nashelsky).
3. Integrated Electronics (Authors: J. Tillman and C. Halkias).
4. Microelectronic Circuits (Authors: A. S. Sedra, K. C. Smith, T. C. Carusone, and V. Gaudet).
5. Fundamentals of Microelectronics (Authors:B. Razavi).
6. Linear Systems and Signals (Authors: B. P. Lathi and R. Green).
7. Signals and Systems (Authors: Alan V Oppenheim, Alan S. Willsky  and S. Hamid).
8. Signals and Systems (Authors: S. Haykin and B. Van Veen).
9. Communication Systems (Authors: S. Haykin and M. Moyer).
10. Modern Digital and Analog Communications (Authors: B. P. Lathi and Z. Ding).
11. Digital Signal Processing in Modern Communication Systems (Author: A. Schwarzinger).
12. Wireless Communications: Principle and Practice (Author: T. S. Rappaport).

Optics

1. Optics (Author: A. Ghatak).
2. Optics (Author: E. Hecht).
3. Fundamentals of Photonics (Authors: B. E. A. Saleh and M. C. Teich).
4. Introduction to Fourier Optics (Author: J. W. Goodman).

Specialized Books

1. Dielectric Resonators (Authors: D. Kajfez and P. Gullion).
2. The Plane Wave Spectrum Representation of Electromagnetic Fields (Author: P. C. Clemmow).
3. Analytical Modeling in Applied Electromagnetics (Author: S. Tretyakov).
4. Substrate Integrated Antennas and Arrays (Author: Y. J. Cheng).
5. Circularly Polarized Antennas (Authors: S. Gao, Qi Lou, and F. Zhu).
6. Microstrip Design Antenna Handbook (Author: R. Garg, P. Bhartia, I. Bahl, and A. Ittipiboon).
7. Phased Array Antennas (Author: A. K. Bhttacharya).
8. Dielectric Resonator Antennas (Authors: K. M. Luk and Ben Leung).
9. Dielectric Resonator Antenna Handbook (Author: Aldo Petosa).
10. Slotted Waveguide Array Antennas (Authors: L. Josefsson and S. R. Rengarajan).
11. Microstrip Patch Antennas: A Designer's Guide (Author: R. B. Waterhouse).
12. Essential Mathematical Methods for Physicists (Authors: H. J. Weber and G. B. Arfken).
13. Introduction to Plasma Physics and Controlled Fusion (Author: F. Chen).
14. Introduction to MIMO Communications (Author: J. R. Hampton).