Gender-less book

Is there any books that use 'they', 'them' and 'theirs' instead of 'he', 'she', 'him', 'her', 'his' and 'hers'?

I wanna see what genders people happen to assign the characters.

Using "they" as a singular pronoun is an abomination.

Every time you do it you are making yourself look like an uneducated American who likes to suck on fat hairy feminists' clits.