Megabank consolidations in the United States: The enigma continues, investigates merger of equals among megabanks as a business model and also postulates that higher premiums are paid for the right to integrate with the very large banks versus that paid for the right to integrate with relatively smaller banks. By introducing merger of equals and megabank premium comparatives, the author has filled a void left vacant by previous researchers investigating inorganic growth among banks in the U.S. banking industry. Decision makers, academicians, policy makers, and students of finance will once more be looking for 'what is out there" in order to guide understandings and decisions re the integration aspects among financial intermediaries. The book sought to illuminate a clarity of understanding involving the analysis and interpretation of organic versus inorganic growth among megabanks in the United States. Despite the general destruction of shareholders incremental value brought about through inorganic growth, the enigma continues in that banks proceed to integrate at an accelerating pace over the past two decades, though there was a brief lull early in this new Millennium.