Hesperian Health Guides, formerly known as Hesperian Foundation, is a nongovernmental non-profit organization publishing health guides for trained and untrained people to care for themselves and others. The foundation is based in Berkeley, California. Among their best-selling publications is Where There is No Doctor, first published in 1973 and updated every few years. The book has been translated to more than 80 languages and the World Health Organization estimates that it may be the most widely used public health manual in the world.