For the most part, reviewing volumes of The Walking Dead seems pointless to me because, well, the idea's pretty damn basic - zombie apocalypse, civilization as we know it has toppled, people live in fear everyday while trying to still get by, survive, and hold onto things worth living for. Over the past 6 volumes, we've gotten to see people grow close to each other and lose loved ones, and Rick has definitely gone through his issues, realizing that it'll take more than being "good" to survive and protect his family. It's not a perfect series - some moments become a bit melodramatic, including an unintentionally hilarious illustration of Lori confronting Rick about her time with Shane - but it's still gripping and entertaining, with just enough investment given to each character so that the fear death hangs over each one.
If this were the TV series, volume 7, The Calm Before, would probably be the stretch of episodes I'd hate because, well, nothing much happens. Yet, as Kirkman's talents as a storyteller have grown, I found this calmer volume to be one of my favorites, if only as a believable breath of fresh air, when danger comes not necessarily from zombies or other groups of people, but from despair, a lull in the action that allows the characters to dwell on their unhappiness and their sins. As the title suggests, danger's not far off, but that gives Kirkman all the time he needs to show what peace might be like in this post-apocalyptic landscape.
P.S. You probably shouldn't read volume 7 unless you have volume 8. They work perfectly together, and the last page of volume 7 will send you to volume 8 immediately.