Book excerpt: Most research on perception has focused on the perceptual experience of three-dimensional, solid, bounded, and coherent material objects - items like tables and tomatoes. But as well as having perceptual experience of such objects, we also experience such aspects of the world as, for instance, rainbows and surfaces, shadows and absences: things that are ephemeral by contrast with material objects. This book presents fifteen new essays on the perceptual experience of such ephemera. The editors' introduction provides a detailed guide to the topic as a whole, setting out the thematic background to this emerging area of research in contemporary philosophy of perception. The volume winds a path through the ephemeral, considering such topics as sounds, smells, transparency, reflection, camouflage, solidity, and ambient vision. A general aim of the volume is to make a case that the broad range of ephemera it catalogues is far from marginal, or insubstantial with respect to their philosophical interest and value. Philosophical attention to perceptul ephemera may well suggest novel routes to arriving at a more developed understanding of perceptual experience at large and its characteristic features.