This was an audiobook read capably by Julie Dretzin, which told the story of a young girl who is at Los Alamos during the development of the atomic bomb. Dewey Kerrigan is only eleven, and since her mother abandoned her, she has been living with a less than satisfactory woman who is hardly fit to be any kind of mom. She is thrilled to get the chance to move back with her father. The only fly in that ointment is that dad is a scientist at Los Alamos (which in English means, lots of Alamo's! No seriously, it means "The Poplars."). But Dewey must travel some distance alone to meet up with him.
Now keep in mind that this is set in the 1940's with the US (along with much of the rest of the world) under a war mentality, so when we find out that she befriends a grown man on the long train journey, it's nothing sinister here, especially since he turns out to be yet another scientist on his way to the same place she's headed.
The means by which they become acquainted is over a little science project which Dewey has set herself. This - the scientific bent Dewey has - was what won me quickly over to this novel. It was refreshing to read a story about a middle-grade girl who had an interest other than boys or the usual gamut of topics with which authors beset their young girl characters. It was truly refreshing for a girl to be shown as self-motivated, smart, capable, and inventive.
It wasn't all plain sailing though. Dewey has a somewhat handicapped leg and is forced to walk with a supportive boot which means she's always wearing odd shoes. Other children make fun of her, but one of the young boys who also lives there befriends her. Now here's where it could imploded like a beryllium ball as an ill-advised young romance sprung up, but this author never went there. She avoided that pitfall and instead set up a different dynamic and the story was much better for it.
At one point her father is required to be out of town on business and Dewey cannot go with him, so for the time he's gone, she's rooming with one of the girls who has been less than kind to her. This girl angrily resents Dewey sharing her home, and much more her room, so the two do not hit it off at once, but over time they become friends. The interactions between these two were charming and engaging to read, and they really brought the story to life for me.
The story culminates with the first test of the A-Bomb at Trinity, and the melted sand is the green glass of the story title. It's not permitted to collect this glass any more, but those who had already picked-up this mildly radioactive material were allowed to keep it and trade it, so it's possible to buy this glass online - and it's also possible to be sold faked trinity glass too, so don't get burned!
I really enjoyed every minute of this book, and I recommend it. It's apparently book one of a series, and while I am not typically a fan of series, I do enjoy one if it's a really good one, so I may well be tempted to go for volume two at some point.