This document is an overview of the "Returns, Last Mile, And Same Day Delivery" research series with links to the documents it contains. Brands are grappling with rising consumer expectations for delivery and returns of their digital sales. Established retailers like Nordstrom and Bloomingdale's as well as digitally native startups have raised that bar by offering free, fast delivery and flexible returns — but at a cost. This series lays out how retailers should optimize their last-mile and return strategies to meet customer expectations while remaining cost-effective.