First one I finished was Osprey Elite #187: Byzantine Imperial Guardsmen 925 1025: The Taghmata and Imperial Guard. I'm not well-versed in Byzantine history, so this one I found pretty interesting.
Then, Osprey Fortress #79: Israeli Fortifications of the October War 1973. The Israelis couldn't really afford to keep heavy concentrations of troops on the Suez Canal, so they built fortifications, but the Egyptians came up with ways to circumvent them and it led to their successes in the Yom Kippur War. Interesting read.
Next was Osprey Warrior #103: Macedonian Warrior: Alexander’s Elite Infantryman, a discussion of the soldiers who marched from Europe deep into Asia. Heck, they were the only army to defeat the Afghan tribes! Another piece of work with loads of information.
Then this morning I finished reading Osprey New Vanguard #196: Warships of the Ancient World 3000 – 500 BC; considering that they have so little data about the most ancient navies, the book gives pretty good detail about what has been deduced. Nice.
I think I may get a few more today...