Cloth-bound, gilt-edged and printed on matte paper, the new book called Horse Play tells the story of Streethorsing—the sport of riding horses in cities—with the highest of production values. Whether or not the obscure subculture actually exists, the tome is filled with unbelievable photos of horses doing skateboard-like tricks off railings and over barriers (challenging pro photoshop-spotters) and interspersed with snaps of minor celebs (who also happen to be spokespeople for the book's sponsor, WESC), like Jerry Hsu, Steve Aoki, Mark "Cobrasnake" Hunter, Stretch Armstrong, and Jason Lee. More images here.