Massutmaning ("Mass Challenge") is non-fiction book written by Tino Sanandaji. Originally self-published in Swedish, the book has been translated to Norwegian, and into English, published by Palgrave Macmillan. Overview. The book consists of 20 chapters and describes the effects of migration to Sweden, starting in the 16th century but with a primary focus on the most recent waves of immigrants. https://en.wikipedia.org/wiki/Massutmaning