The document discusses the Biodiversity Heritage Library (BHL), a digital library that provides open access to biodiversity literature from the 18th-21st centuries. It summarizes the key features of BHL, including its global reach and users, search and browsing capabilities, options for downloading and reading materials, and use of ePubs and eReaders. The document emphasizes how BHL provides convenient access to reference materials without borders through interdisciplinary research and outreach opportunities. It presents BHL as an ongoing project in perpetual beta to connect content from field notes, specimens, and literature.