This was recommended to me last year during the Smashwords Sale (it may have even been free at the time). It took me longer than expected, but I read it, and I love it.

I don't like reading books taking place during or after the Apocalypse for a variety of reasons, but the simplest one is "it stresses me out and makes me despair over the state of the world". This is not stressful. This is a downright soothing book.

The book has its own unique take on vampires.

One of the main characters is trans, and it is only mentioned in passing, and has no impact on the plot.

I think if you're a library nerd you'll really like this book.