3i (Investors in Industry, and formerly the Industrial and Commercial Finance Corporation, etc.) is Britain's leading venture capital company. Founded in 1945 as a result of a combination of pressures and counter-pressures from political parties, Whitehall, the Bank of England, and the clearing banks, the organization has played a significant role in post-war investment banking and industrial development.

The first part of the book traces its history from the early years of post-war reconstruction and the role played by Piercy and Kinross, through the years of consolidation, to the higher-profile years of the change of name and style and the 1994 flotation. The second part offers an inside view of the workings of this unique institution - the controllers, 3i's role in developing MBOs, methods of assessing risk and return, its relationship with capital markets, etc.

During its first 50 years 3i has invested in numerous well known and successful companies - many of these are detailed in the text (British Caledonian, Oxford Instruments, Laura Ashley, etc.). The book is also elegantly and innovatively designed, making good use of the well known 3i cartoons.