San Diego 2014 was nominated for an award (Nebula, I think--too tired to look it up) last year, but it was only available in electronic format and I don't know how to donate those to the library. But I was searching for award winners this year and found that my library had acquired it in electronic form. So by happy chance I am able to catch this up and provide a review.
This is a "prequel" to the Newsflesh trilogy (I have reviewed all three--the link is to Feed, the first one). Mahir Gowdha, a survivor of the original trilogy's blogging group, is interviewing one of the very few survivors from San Diego Comic-Con 2014, where one of the early breakouts happened. The novella tells the story of those trapped inside.
Where Newsflesh was grim, yet sarcastic and humorous, this story tends more toward just grim. No one gets out alive--it's mostly about their last moments, and doesn't really stand alone. Best if you have read the original trilogy, since the story is set after the series. I would say it's worth seeking out if you have. And the original series is definitely worth the read if you have not. 3 stars for this one.