"Two Eras of Genesis?" by Philipp Röttgers offers an in-depth analysis of the British rock band Genesis, known for their remarkable career and influence on music history. The book examines the transformation of the band from their beginnings as a progressive rock group in the 1970s under the leadership of Peter Gabriel to their evolution into a pop band in the 1980s with Phil Collins as the frontman. Röttgers questions the common perception of these changes and explores whether there is indeed a clear break or if misunderstandings exist. Through the analysis of songs, live performances, music videos, album covers, as well as press and fan reviews, the history of the band is comprehensively presented. Additionally, the solo careers of the members are considered to investigate whether the image of Genesis should be reassessed.