20 chapters, 20 architectures, 20 light projects, 20 years of ag licht – the anniversary workbook is just as clearly structured and designed as the fascinating lighting solutions of the well-known Bonn-based light design team under Wilfried Kramb, Daniel Walden and Klaus Adolph. The large format strikingly highlights the multifaceted international projects in precise architectural photographs. In addition to the generous layout a powerful and elegant typographic language, using only one font, makes a clear and informative impact. In richly contrasting black and white, the letters of the cover page look like playful light lines that wrap infinitely around the spine, back and front of the hard cover. This creates a surprisingly playful moment as a deliberate contrast to the otherwise precise and austere design of the workbook.