Health information on Wikipedia read and required at least a university graduate reading level. The study's authors were concerned by Wikipedia's low readability, as people with autoimmune disorders often use Wikipedia to research their condition. A 2018 study evaluating 55 Wikipedia articles on neurosurgical topics found that they were significantly more difficult to read than the American Association of Neurological Surgeons's patient information articles, although both Wikipedia's articles and the AANS articles required a college reading level. Wikipedia co-founder Jimmy Wales has said that lack of health information increases preventable deaths in emerging markets and that health information from Wikipedia can improve community health.
The Wikipedia Revolution Lih describes the importance of early influences on Wikipedia including Usenet, Hypercard, Slashdot, and MeatballWiki. He also explores the cultural differences found within sister projects such as the German Wikipedia, the Chinese Wikipedia, and the Japanese Wikipedia. The book also covers the Citizendium project, originally a fork of Wikipedia by co-founder Larry Sanger. There is a foreword by Wales, and an afterword partially created by volunteers through an online wiki detailing the problems and opportunities of Wikipedia's future. The Wikipedia Revolution The Wikipedia Revolution: How A Bunch of Nobodies Created The World's Greatest Encyclopedia is a 2009 popular history book