This fourth volume of the Iconicity series is like its predecessors devoted to the study of iconicity in language and literature in all its forms. Many of the papers turn the notion of iconicity ‘inside-out’, some suggesting that ‘less-is-more’; others focus on the cognitive factors ‘inside’ the brain that are important for the iconic phenomena that are produced in the ‘outside’ world. In addition this volume includes a paper related to iconicity in music and its interaction with language. Other papers range from the theoretical issues involved in the evolution of language, to those that offer many ‘inside-out’ claims, such as claiming that nouns are derived from pronouns, and as such should more properly be called ‘pro-pronouns’. Also, this volume includes perhaps the first English-language analysis of the iconic aspects of sound symbolism in a prayer from the Koran. This is a truly interdisciplinary collection that should turn some of the notions of iconicity in language and literature ‘outside-in’ and ‘inside-out’.