Alessandro De Maddalena is the curator of the Italian Great White Shark Data Bank and a founding member of the Mediterranean Shark Research Group. He is the author of 17 books on sharks and teaches a course in shark biology in Simon’s Town, South Africa, in association with Apex Shark Expeditions. Harald Bänsch is the chief biologist of the Vieques Shark Research Field Station investigating the population dynamics of coastal reef sharks. He has been a collaborator for the Shark Research Center of Walker’s Cay, Bahamas, and he has joined several research expeditions of the National Oceanic and Atmospheric Administration (NOAA) / National Marine Fisheries Service (NMFS) in Mississippi and in the Northern Atlantic, U.S.A., studying populations and agonistic behaviour of sharks of the genus Carcharhinus on field stations in Mozambique, Fiji and in the Caribbean. He lives in Germany. Walter Heim a mechanical engineer, started photographing sharks in 2001 and with his daughter Jessica has developed techniques to photograph mako and blue sharks at close range. His pictures have appeared in many books and wildlife magazines.