Book: The Way of Kings by Brandon Sanderson
About: Follows four characters - more or less, other characters jump in and out for a chapter or two occasionally - During the middle of a war between civilizations to capture Shardblades; magic swords that can cut through anything and shear through the souls of living creatures, and Shardplate; suits of armor that bestow amazing strength, speed, and agility on its wearer, and are nearly impossible to damage themselves. Highprinces also seek out "Gemhearts", giant jewels found in the carapaces of massive 30-50 foot tall crustacean monsters called Chasmfiends. These jewels, along with gemstones of all other sizes, are used to channel Stormlight, magic that can allow you to transform objects into other objects, change the orientation of gravity around you, heal the injured, and other mystical things.
Enjoying it: Yes, it's a ton of fun so far. There's lots of action, and I think it's very well written.
It clocks in at about 1,200 pages. I brought it with me on an airplane to visit family and I read about 350 pages while I was at the airport. I just got so sucked into it I found it hard to put down. So far I'm at page 470, and there's no sign of it letting up.