More New Species and Records of Featherwing Beetles (Coleoptera: Ptiliidae), the world's smallest insects, like the earlier book (New Species and Records of Featherwing Beetles (Coleoptera: Ptiliidae), 2017) puts together a number of recently published papers in Entomologist's Monthly Magazine, European Journal of Taxonomy and Entomologische Blätter für Biologie und Systematik der Käfer. The author hopes that this will prove helpful to Museum workers in particular and will also encourage an interest in others in this fascinating family of beetles. Four new genera and 166 new species are described and illustrated, many being the first records for their countries. Because of their minute size - most are lesss than 1mm long - Ptiliidae have been ignored by many students of beetles and have been little studied as a result. The author's specialist techniques both for collecting and in the laboratory are fully described. More than 1000 images are included in the book. Because Featherwing beetles exhibit both polymorphism and parthenogenesis, and some even produce sperm which is much longer than the adult insect, they make potentially interesting models for biological research.