Books and articles written about transgender people or culture are often outdated by the time they are published, if not already outdated at the time of composition, due to inappropriate and/or outdated questions or premises. Not only psychology and medicine, but also social sciences deal with transgender people, and each starts from a very different point of view, offers very different perspectives, and uses a different nomenclature. The difference is mirrored by the attitude of transgender people towards transgender issues, as can be seen in the articles listed below.
Many other terms describe gender-variant people or behaviour, without the people being described necessarily being transgender.
Sexual orientation and behaviour are independent from gender identity; since both are often mentioned together or even confused, some relevant topics are mentioned here. The first article elaborates on this question.