Variation in P is an essential follow-up to the seminal proposals of the generative tradition regarding prepositional syntax. Recent research shows that prepositional phrases have a complex internal structure, and that the grammatical encoding of locative meaning has its own place in universal grammar. The papers collected in the first part of this volume not only test these proposals against new comparative data, but also shed light on the relation between spatial expressions and other semantic relations like possession. The second part of the volume explores the role of prepositions in non-spatial environments as well as in more general phenomena like verbal affixation, ellipsis, and complementation. By drawing on evidence from less studied languages, and by considering prepositional syntax in interaction with clausal syntax as well as within prepositional phrases, Variation in P refines and develops theories introduced by previous generative studies.