His roof of the Olympic area in Munich looks as if a huge circus had clamped its tents – made of glass. Seeming, elegantly curved structures were flying to fly at all: If he hadn’t died in 2015, the architect would have been 100 years old. On this occasion, Joaquín Medina Warmburg and Anna-Maria Meister celebrate him with the band Free Otto – Building with nature (€ 62.95 / 256 pages, Prestel): Because not only did he look back on their forms, the German was also a visionary of ecological building. Another keyword: self -made. 250 illustrations of buildings, sketches, models, work.