Ultra Violet Lesbian Books

What are your favourite lesbian books of all time?

I have several... but if I chose one it would be Nicola Griffith's Stay. It's the 2nd in her Aud series but I read it first - I didn't realise there were others and I was so inspired by the writing and the story and the characters. It's actually probably my favourite book of all time, lesbo or not!

After that I have a long list!

More recently:
The Spanish Pearl and The Crown of Valencia.

Anything by Sarah Waters.

It's important to me that a book is well written and has a plausible story.

So what are yours?