Many studies show that e-book awareness and usage is growing. Using vendor-supplied usage statistics for business and economics e-books, the authors sought to determine if a few titles accounted for a large percentage of usage. If proven, the authors hoped to be able to develop collections strategies to maximize e-book usage. Focusing on three providers, SpringerLink, NetLibrary, and eBrary, results showed that annually, a small number of titles accounted for a large percentage of usage. However, over the collection's lifetime, a higher percentage of titles were used. A small collection of Patron Driven Acquisition eAudio books were also examined. [ABSTRACT FROM PUBLISHER]