For some reason, and I honestly don't know why, some fans don't like James Swallow. I remember my friend who got me into BL, only about three years ago now so I'm still playing catchup with the HUUUUGE back catalog, was not a fan and warned me away. I kind of wanted to check him out just because of the warning. Turns out I liked Mr. Swallow, and this book here: 'Hammer and Anvil', is, in my humble opinion, the best book he's written.
The story follows a group of Adepta Sororitas (Sisters of Battle) as they return to Sanctuary 101 to rebuild it following a mysterious loss of the entire installation and everyone in it. In the process they find a survivor of what happened to the original garrison/convent, get into a huge spat with the Mechanicus, get, essentially, abandoned by the Inquisition, and find out who, or what, destroyed the original installation.
The two main characters in this book are the same two from James first foray into the Sororitas, 'Faith and Fire': Sister Miriya and Hospitaler Verity. Rather than 'humanize' one or both of the characters to make them more relate-able to a modern audience James holds true to the rather brutal nature of faith and duty in the 40K universe and reminds us that far more than just pretty faces, the Sisters of Battle truly are warrior nuns (as Space Marines are, essentially, warrior monks) with all of the fierceness and unrelenting nature of their faith that comes along with it.
The action in this book, as in all of James books, is well written and in this one it is generally at a larger scale than much of the works he likes to create. This is due, in large part, to the nature of the baddies that the Sisters have to go up against: the Necrons.
Most writers (and so far I've only encountered Necrons from four autors- McNeill, Counter, Mitchell and Swallow) tend to show the Necrons as mindless automatons, mindlessly, yet efficiently, exterminating all life as they, slowly and ominously, march across the battlefields laying to waste both the warriors and the innocent that they encounter. Instead, in this book, Swallow actually delved into the Necron culture and the result is a far richer book for it.
Without giving too much away, this is a great read and the only disappointment with this duology is that it's the only Sororitas fiction out there. It is my hope that either James delves again into the ranks of the Sisters or some other author picks up a bolter and forges new sagas in their honor.
And on a side note: it'd be awesome if James would write a Necron novel, just a thought of mine. I doubt it would sell well as there are so few Necron players out there, but I'd still love to see them expanded upon. At least just a bit.
All in all an easy 4 stars and a worthy few hours of reading. Plus, there's little on the Sisters so this is about the best you can hope to find.