Understanding Asexuality (9781442200999): Anthony F. Bogaert. Good Lesbian Books: Asexual Lesbians/ Asexual Women in Fiction. Asexual characters are rare and difficult to accurately identify, but they do exist in fiction.
This is a list of all the female asexual characters and Asexual lesbians* in novels and other books, whether roaming singly or in a 'Boston Marriage' (a 19th century term for two women committed to each other in a non-sexual relationship). *(Obviously romantic asexual female pairings are also all female asexual characters, it's just a bit tricky trying to define them without using a whole sentence!)
For the purposes of this list, only characters inside a sexual canon displaying asexual traits should be counted as asexual (i.e. they have to be presented with an opportunity to display sexuality, not just 'never have sex'). Asexuality. Writing From Factor X.