The category P belongs to a less studied area in theoretical linguistics, which has only recently attracted considerable attention. This volume brings together pioneering work on adpositions in spatial relations from different theoretical and cross-linguistic perspectives. The common theme in these contributions is the complex semantic and syntactic structure of PPs. Analyses are presented in several different frameworks and approaches, including generative syntax, optimality theoretic semantics and syntax, formal semantics, mathematical modeling, lexical syntax, and pragmatics. Among the languages featured in detail are English, German, Hebrew, Igbo, Italian, Japanese, and Persian. This volume will be of interest to students and researchers of formal semantics, syntax and language typology, as well as scholars with a more general interest in spatial cognition.