Wallraff publishes an ad in a newspaper as Ali Sigirlioğlu, stating his willingness to work any job, including hard labor.

Wallraff concludes his undercover experiment after two years as a result of the physical strain and health problems the various jobs caused him.

Wallraff’s conclusions from his experiment reflect the xenophobic treatment and exploitation he faced while playing the role of a young Turkish migrant worker.

[2] He recounts the social isolation he faced as a Turkish man, describing various incidents where individuals would insult, berate or threaten him without provocation.

The book was very successful upon publication, with more than four million copies being sold within the original German run, and being translated into 30 languages and distributed in several countries.