This is a lovely book that elaborates the elegant and simple functional linguistic perspective of Jackendoff's (2002) "Parallel Architecture" research program into a detailed attempt to explain what lexical items are. The answer that Jackendoff and Audring arrive at is surprising: there is no principled distinction between grammar and lexicon, contrary to what has standardly been assumed. There is a wealth of fascinating predictions to test here.
Ray Jackendoff is Seth Merrin Professor Emeritus and former co-director of the Center for Cognitive Studies at Tufts University; he is currently a Research Affiliate in Brain and Cognitive Sciences at MIT. He has written widely on syntax, semantics, the architecture of grammar, the evolution of language, music cognition, and consciousness. He was the recipient of the 2003 Jean Nicod Prize and the 2014 David Rumelhart Prize, and has served as President of both the Linguistic Society of America and the Society for Philosophy and Psychology. He is the author of the OUP volumes Foundations of Language: Brain, Meaning, Grammar, Evolution (2002), Simpler Syntax (with Peter Culicover, 2005), Meaning and the Lexicon: The Parallel Architecture 1975-2010 (2010), and A User's Guide to Thought and Meaning (2012).
Jenny Audring is Assistant Professor of Linguistics at Leiden University. She specializes in morphology and has written extensively on grammatical gender. Her research interests range from linguistic complexity and Canonical Typology to Construction Morphology and morphological theory. She is the co-editor, with Francesca Masini, of The Oxford Handbook of Morphological Theory (OUP, 2018) and, with Sebastian Fedden and Greville G. Corbett, of Non-Canonical Gender Systems (OUP, 2018).