The little book that builds wealth provides a sensible framework for identifying companies that can sustain high returns on capital pat dorsey tells the reader how to look for durable competitive advantage in choosing equities. The little book that builds wealth the knockout formula for finding great investments little books big profits 16pt large print edition dorsey pat 9780369321688 books amazonca. In the little book that builds wealth author pat dorsey the director of equity research for leading independent investment research provider morningstar inc reveals why competitive advantages or economic moats are such strong indicators of great long term investments and examines four of their most common sources intangible assets cost advantages customer switching costs and network economics. In the little book that builds wealth pat dorsey believes that the best indicator of profitability is the companys return on invested capital roic it describes how effectively businesses can use the assets that investors have provided unlike return on equity roe roic is not distorted by leverage