Mark Blake's new book, Pink Floyd – Shine On: The Definitive Oral History, focuses on the band's contentious relationship within the ranks of David Gilmour, Roger Waters, Richard Wright, and Nick Mason. The book, which includes numerous new interviews, research, and knowledge gleaned from 35 years of covering the band as a journalist, reveals that there was a lack of brotherhood among the band members. Despite this, the battles within Pink Floyd were behind the scenes, which were often heated and destructive. The author acknowledges that the band’s two best albums, The Dark Side of the Moon (1973) and Wish You Were Here (1975), managed to avoid prog rock's worst impulses while appealing as relatable meditations on universal themes such as time, death, the hereafter, insanity and absence. Despite these tensions, Blake concludes that the book is not a dry sociological history but a compelling portrayal of a culture of revolutionary ideas produced by the band.