As we move into the heat/cold of the next couple months (depending on your hemisphere), it's good to have a book to either snuggle up with and read next to the fire, or to look over while escaping from the oppressive temperatures outside. Osprey Publishing is helping out with that, having a sale going on now over in their webshop.
From now until the end of the month, you can get 25% off your Campaign, Combat, Command, and Fortress purchases. The sale covers both print and eBook versions, depending on whatever format you prefer. The sale stacks with your membership discount, if you happen to have one with Osprey.