It's hard to imagine anyone picking up this book who isn't aware of the massive resurgence of zombies across pop culture the last few years. From film (28 Days Later, Shaun of the Dead, Zombieland, etc.). to fiction (Pride and Prejudice and Zombies, HIstory is Dead), to mock non-fiction (Zombie Survival Guide, World War Z), to comics (The Walking Dead, etc.) to video games (Zombie Apocalypse, etc.), zombies have become an unavoidable cross-platform genre. It seems like the only thing holding zombies back from the mainstream success enjoyed by vampires is their total lack of sexiness.
In any event, this faux-journal of a year-long zombie "epidemic" is a perfectly nice addition to the ever-expanding zombie canon. The journal is the birdwatching journal/sketchbook of a doctor, who turns it into a journal of an epidemic, complete with gruesome watercolor and ink renderings of zombie anatomy. (The doctor is named Twombly, which is probably a nod to contemporary abstract painter Cy Twombly, some of whose work features ink and paint splashes that might have influenced the art here.) It's not really a graphic novel in the traditional sense, it's an illustrated diary, with each spread covering a day, and is the perfect length to be read in one sitting.
The story hits all the zombie genre marks -- survivors are holed up, their numbers drop, the hero has to make his escape. Then he keeps on the move, trying to find somewhere safe and link up with other survivors, all while trying to figure out what caused the epidemic and trying to figure out. He meets the usual cast of colorful folks, gets through some close calls, sees fellow survivors suddenly turn violent, etc. In the end there's nothing particularly noteworthy about this book other than its format and Chris Lane's art. So, if you're a zombie-lover, this is probably right up your alley, and if you're not, there's no reason to pick it up.