The book depicts the design, research and construction processes of one of the most singular buildings that has been lately built. Il Cielo iGuzzini is located by one of the roadway hubs of Barcelona, in a fragile condition of stability on the site where it sits. Without modifying the topography, a large underground space is previously delimited, regular in form, providing for storage, parking, showroom, auditorium, technical services. Its roof is proposed as an exterior technical floor such that it works like an outdoor showroom. Atop this underground container emerges the company building, spherical in form though slightly deformed on the south side. A large central void, occupied by the single column from which the entire building is suspended, permits greater light and energy control inside. The spaces within the sphere are offices and, on the upper floors, research facilities.