This is a 10 years anniversary monographic book of the architects’ studio ON-A, based in Barcelona. It was founded by Jordi Fernández Río and Eduardo Gutiérrez Munné as an architectural laboratory to seek and develop innovative design with quality and strategies with new methods, latest technology and knowledge of the environment. This book covers ON-A’s establishment and corporate image introduction, along with their achievement in the six areas: underground architecture, public space, residential space, green architecture, fusion design and building information modeling (BIM), revealing ON-A’s history, philosophy and emotion on architecture from the beginning phase of their studio to their global growth with their representative projects.