Just finished the latest Seige of Terra book, this time the Novella.
All I can say is that its a bit of a rollercoaster, and coming out you really feel the gut-punches of the plot viscerally. Sets up some interesting future plot points too. Expensive in New Zealand dollars, but I personally think it was worth it!
Pick it up when you can if you are a fan of the fiction. I don't know if Graham McNeill is on here, but if he is, thank-you for this book!