Cryocoolers 13 is a comprehensive technical book that focuses on the latest developments in the field of pulse tube cryocoolers. Over the past two years, there has been a significant shift towards these technologies, which are designed for applications requiring high reliability and long lifespan. The book discusses the development of very large pulse tube cryocoolers capable of delivering up to 1500 watts of cooling power. These technologies are applied in various industries, including the cooling of superconducting magnets for magnetic levitation trains, the cooling of superconducting cables in the energy sector, and the liquefaction of natural gas. The different types of pulse tube cryocoolers, including Stirling and Gifford-McMahon types, are described in detail, along with advancements in regenerative rare earth materials. The book serves as a valuable resource for professionals and researchers involved in cryotechnology and its applications.