In what has been deemed an urban legend, reports from 1983 stated that as a result of overproduction and returns, millions of unsold cartridges were secretly buried in an Alamogordo, New Mexico landfill and covered with a layer of concrete. In April 2014, diggers hired to investigate the claim confirmed that the Alamogordo landfill contained many "E.T." cartridges, among other games. James Heller, the former Atari manager who was in charge of the burial, was at the excavation and admitted to the "Associated Press" that 728,000 cartridges of various games (not just E.T.) were buried. Marty Goldberg, co-author of the book "Atari Inc.: Business is Fun", adds that the dump was in fact a clearing out of Atari's Texas manufacturing plant's unused cartridge stock of a number of titles, as well as console and computer parts. According to the documentary, "", only 10% of the approximately 1,300 recovered were E.T. cartridges.