First, it was Osprey Weapon #21: MG 34 and MG 42 Machine Guns, a weapon system so highly regarded that they spawned a swarm of imitations still in use. Not a bad read.
Next, I read Osprey Weapon #22: The Sten Gun, the cheap, easily produced WWII weapon that's iconic for commando operations of the war. Again, not bad.
Then it was Wolves Eat Dogs the fifth of the Arkady Renko mysteries by Martin Cruz Smith. I read the first book of this series, Gorky Park at the behest of my paternal grandfather decades ago because he felt that the book really gave the appropriate feel for the life of those in the Soviet Union at the time depicted. I've enjoyed each book since, and there's more to read as I'm not presently caught up. This one brings the protagonist to Chernobyl for a very strange investigation. The series is worth a read.
Finally, another Osprey, this one being Osprey Weapon #25: The Vickers-Maxim Machine Gun; a theme this week of automatic weaponry, no? Not a bad piece of work, either.