There's zombie fiction and then there's fiction that uses zombies and a zombie outbreak to tell stories about how regular people react to it. That's the most interesting stuff, where the desperation makes for more interesting stories about people. It's not the gore or killing zombies that's the interesting stuff, but rather how people turn on each other or work together in extraordinary circumstances. World War Z is great at that and The Walking Dead as well. The zombies are pretty much just a catalyst to make things interesting.
Another book, not about zombies but interesting in the same way as World War Z, is Robopocalypse.
12 team H2H dynasty, most categories under the sun, incl. hits/blocks. Main team, farm
C: Kopitar Backstrom Stepan Cammalleri Little Bolland Laich Johnson
LW: Parise Lupul Erat McDonald Martin Silfverberg Nyquist Schwartz Morin Nieto Conacher
RW: PKane Doan Pominville Nash Clowe Lupul Rinaldo Stafford Rattie Stone Chiasson Ritchie
D: Green Suter Seabrook Dillon Beauchemin Schenn Letang Schultz Hamilton McNabb Rielly Harrison
G: Bryzgalov Pavelec Holtby Neuvirth Nihlstorp Lack CalPickard Andersen Stalock Sateri Eriksson