Buy This Book: 'Usagi Yojimbo: Senso'
The thing about Stan Sakai's Usagi Yojimbo is that it's been one of the best comics on the stands for over 30 years. It's both fantastic and consistent to the point where I can't think of a bad issue, but when every single installment of a comic is at that high a level of quality, you sort of get used to it. It gets to the point where the stories are as epic and thrilling as they've ever been, but they don't quite surprise you in the way that you want them to, if only because you're expecting them to be that good, and as much as I love Sakai's work, it's been a while since I've actually been surprised by it.
Until I read Usagi Yojimbo: Senso, I mean. Because really, if you want to spice up an exhaustively researched samurai adventure story about a cast of furry animals, it just makes sense to throw a Martian invasion into the mix.