 In the 1990s, Fehlbaum developed a close relationship with Tibor Kalman, resulting in a number of projects including the 1998 book Chairman Rolf Fehlbaum.More recently, a similar working relationship was established with Cornel Windlin, who designed the first Vitra Home catalogues and conceived the publication Project Vitra – a survey of the company's history, self-image and products – together with Fehlbaum in 2008.Architecture emerged as Fehlbaum's second major interest.