The fifth and final issue of Atomic Robo and the Ring of Fire will go on sale January 27th, but you can pre-order yours. And you really should! It's what keeps the lights on over here.
If you had a lick of damn sense in that thing on top of your neck, you'd run out to your local comic book shop right now and make sure you're gettin' the goods. It comes in two varieties. Regular and Gurihiru.