Recently nanosponges emerge as one of the promising area in nanotechnology because of their remarkable results in various fields like medicine, agriculture, water purification, etc. Broadly, nanosponges have been prepared from many different organic or inorganic materials by interacting with cross-linker/s and possess characterizing nano or smaller dimensions. This book is highly engaging and focusing on different applications of cyclodextrin nanosponges as drug, insecticide and flame retardant carriers by using different cross-linking agents. New methods invented for the preparation of nanosponges are also incorporated.