idg books, which was a public company spun off from the privately held idg, published the popular self-help "...for dummies" books. the ""...for dummies"" range was originally limited to computer related fields, but later expanded to include a much wider variety of topics. the series is now published by john wiley & sons. idg books/hungry minds — as idg books was briefly renamed before being sold to wiley in 2001—no longer exists as a separate company.