In monetary terms, investment firms have both a lot to answer for and a lot to supply in terms of achieving the pace of transition required to mitigate some of the catastrophic effects of climate change. Pragmatists on the left, including proponents of the Green New Deal, eye the enormous resources floating around in the financial world as possible sources of green investment. Adrienne Buller’s The Value of a Whale answers this temptation with a firm, detailed ‘No.’