The framework programmes are the EU's main instruments for the funding of research and innovation in Europe. Horizon 2020 is the eighth EU framework programme for research and innovation for the period 2014-2020 with a budget of nearly EUR 77 billion. It was designed to drive economic growth and create jobs by coupling research and innovation with an emphasis on excellent science, industrial leadership and tackling societal challenges. After three years of implementation, this book presents the results of the interim evaluation of Horizon 2020, in line with Article 32 of the Horizon 2020 Regulation and the Commission's Better Regulation Guidelines. It looks at whether Horizon 2020 is on track to achieve its objectives and provides lessons learnt for the next Horizon 2020 work programme and the preparations of future framework programmes.