In practice, this means that most of the more trustworthy material is found in Unfinished Tales and in volumes X-XII of the HoMe series. It is important to note that many aspects of Middle-earth changed substantially over the course of Tolkien's life. Because of this, facts taken from the early versions of the mythology can be misleading or just plain wrong when used to draw conclusions about LotR or later versions of the mythology. This means that while the early versions can provide valuable hints about Tolkien's thoughts on an issue, they are rarely considered to provide definitive evidence for any position. The relative influence of Medieval and other periods has been hotly contested.
Some people find what they consider clear indications of racist attitudes in Tolkien's works.
Others argue that those attitudes are not so clear, or that they do not exist at all. There are indications that in his everyday life, Tolkien was if anything less racist than most. Therefore, there are no legal electronic copies of Tolkien's writings. If you do find an unauthorized copy of any of Tolkien's works on the Internet, you may want to take some action to support the rights of the Tolkien Estate. It is generally best to begin with a polite request that the texts be taken offline, and only if that fails to take more drastic action such as contacting the hosting Internet service provider.