Section 1: Surface Modification of Fibers and Their Composites Chapter 1: Introduction and background of fiber surface modification Chapter 2: Recent Developments in Natural and Synthetic Fibers, Polymers, and their Composites Chapter 3: Surface Wettability and Interfacial Behavior of Surface Modified Fibers and Composites Chapter 4: Surface modification of animal-based fibers and their composites Chapter 5: Surface modification of mineral fibers and their composites Chapter 6: Surface modification of bast-based fibers and their composites Chapter 7: Surface modification of leaf-based fibers and their composites Chapter 8: Surface modification of root-based fibers and their composites Chapter 9: Surface modification of fruit and seed-based fibers and their composites Chapter 10: Surface modification of stalk-based fibers and their composites Chapter 11: Surface modification of natural fillers and their composites Chapter 12: Surface modification of synthetic fillers and their composites Chapter 13: Challenges and Future prospects of fiber surface modifications Section 2: Surface Coating of Fibers, Polymers, and their Composites Chapter 14: Surface modification of fibers through Coating: An overview Chapter 15: Coating materials and their processing for fibers and polymers Chapter 16: Coating techniques for coating fibers and polymers and their stability Chapter 17: Morphology and Characterization of Surface-Treated Fibers Chapter 18: Coating of fibers and polymers with synthetic materials Chapter 19: Coating of fibers and polymers with bio-based materials Chapter 20: MXene-based coatings for fibers and polymers Chapter 21: Computational Modeling of Surface Coating of Biocomposites Section 3: Properties and Applications of Coated Fiber Composites Chapter 22: Mechanical, thermal, and electrical properties of coated fiber reinforced polymer composites Chapter 23: Challenges and Future Prospects of Coated Fiber Reinforced Polymer Composites Chapter 24: Coated fiber reinforced polymer composites for energy storage applications Chapter 25: Life Cycle Assessment of Surface modified fiber reinforced composites Chapter 26: Effect of Graphene Coated Glass fibers on Mechanical Behaviour of Recycled PET-based Composites