The book "Nano Hybrid Resin Composite Materials Following Staining and Bleaching" offers a comprehensive investigation into the color changes of two nano hybrid composite materials, Omnichroma and Joyfil, after exposure to coffee solutions and the application of 30% hydrogen peroxide for in-office bleaching. The authors, Zahraa Sabah Abdulwahhab and Emad Farhan Al-Khalidi, analyze the effects of these procedures not only on color change but also on the surface roughness of the two new composite restorations. This study is particularly relevant for professionals in the field of dentistry who are concerned with the aesthetics and longevity of dental materials. The findings provide valuable insights into the practical applications and performance of these innovative materials in clinical practice.