Health Books International was founded over 50 years ago as Teaching-aids At Low Cost (TALC), and is now managed by Practical Action Publishing [https://practicalaction.org/publishing/]. HBI sources, produces and distributes practical and accessible health books, CDs, DVDs, accessories and downloads designed for use in developing countries where resources are limited. Our aim is to put affordable knowledge into the hands of people who need it most, whatever their location, in a language and format that suits them best.