Hovers’ manual of things / concept Floris Hovers, Wouter Botman ; authors Marlies Hummelen, Floris Hovers ; editor Marlies Hummelen ; translator: Working Words/Tanya LevyHovers’ tractors / concept Floris Hovers, Wouter Botman ; author Marlies Hummelen ; editor Marlies Hummelen ; translator Tanya Levy ; photography Floris Hovers