Within the prestigious Comprehensive Analytical Chemistry series, volume 93, the Elsevier has published the book Analysis and Characterization of Metal-Based Nanomaterials, edited by the co-workers of the Department of Environmental Sciences of the Jožef Stefan Institute prof. dr. Radmila Milačič, prof. dr. Janez Ščančar and dr. Janja Vidmar, and dr. Heidi Goenaga-Infante from LGC, UK. The book summarizes recent progress in analytical methodologies for detection, characterization and quantification of metal-based nanomaterials (NMs) in a variety of complex samples. The use of establish validated analytical methods is of paramount importance in the evaluation of the risk that metal nanoparticles (NPs) may pose to the environment and human health. The book importantly contributes to the treasury of knowledge in the field of analytical chemistry and ranks Slovenian researchers among the world's top scientists in the field of NMs research. Along with renowned world scientists, promising young researchers from the Jožef Stefan Institute also contributed their chapters: Janez Zavašnik, Andreja Šestan, Vasyl Shvalya, Nina Kostevšek, Igor Serša and Janja Vidmar.