"Petrosino's book offers a seminal contribution to the discussion of morphological decomposition and processing. Framed around a coherent set of fundamental questions and around four hypotheses from the literature that generate distinct predictions, the book details a series of (chiefly) priming experiments aimed at addressing how different types of linguistic representations, from the phonological to the morpho-phonological to the syntactic, affect decomposition. The work is careful and thorough in its evaluation of competing hypotheses, transparent about methodological considerations, insightfully nuanced about the interpretation of its experimental results, and considerate of complex and outstanding issues in linguistic theory. Petrosino's book deserves the attention of any researcher engaged with morphological topics, from psycholinguists to generative theorists."Luke AdamsonLeibniz-Zentrum Allgemeine Sprachwissenschaft, Germany