Silver nanoparticles are nanoparticles of silver, of between 1 nm and 100 nm in size. While frequently described as being 'silver' some are composed of a large percentage of silver oxide due to their large ratio of surface to bulk silver atoms. This book explores the properties, characterisation and application of silver nanoparticles on topics such as low and high-order nonlinearities of silver nanoparticles; the synthesis, growth mechanisms and tuneable optical and catalytic properties of silver nanoparticles; laser-induced shape transformation of silver nanoparticles embedded in glass and others.