The book "Should Conglomerate Mergers be Per Se Legal?" by George P. Kyprianides provides a comprehensive analysis of conglomerate mergers and their potential impact on market competition. It examines the seven generic criteria of the European Commission for assessing such mergers and highlights the strategies that conglomerates may employ to hinder competition. Special attention is given to economic efficiencies and the traditional economic perspective, while also critically reviewing the Commission's decisions regarding significant cases such as Kraft/Cadbury and the less successful cases Tetra/Sidel and GE/Honeywell. The book also discusses the burden of proof, the role of Article 102, and the SIEC test, offering suggestions for improving the Commission's existing guidelines to ensure greater legal certainty in the market.