The master of street art chalk drawings shows us his latest creations, which always last only until the next downpour.David Zinn's works are created from chalk, charcoal and found objects. The endearingly wacky and deceptively three-dimensional figures come to life on street corners, manhole covers and streetlights, village squares and subway platforms. The diversity of Zinn's menagerie is limited only by the size of the sidewalk and the artist's mood of the day.In a brief introduction, the artist describes his creative process and explains how he seeks out everyday imperfections for his art - like cracks in the sidewalk, clumps of weeds and drain pipes. Although these amazing chalk drawings may no longer surprise pedestrians when the rain washes them away, some 140 works created over the past two years live on in book form to fascinate and inspire readers of all ages and around the world.