The genres and subgenres used to organize fiction in seven online bookstores, as well as by the OCLC network and in Wikipedia, are compared with those covered by the Library of Congress Genre/Form Terms (LCGFT). The genres assigned to a sample of common titles were also compared. The genre schemes of the bookstores and Wikipedia differed markedly from LCGFT and the OCLC list, while the genres used for particular titles differed markedly even amongst bookstores. As well as differences due to domain, geography would also appear to be a major factor.