"The Heart's Desire" was my least favorite of the first four volumes, due primarily to its heavy focus on melodrama and petty in-fighting. Side note - I'm halfway through volume 5 as I write this review, and I'm happy to report things are back on track.
Volume 4 introduces Michonne, the cloak-wearing, sword-bearing, zombie-escorting badass. I closely follow news regarding The Walking Dead television show, so I was well aware of Michonne's status as a fan favorite, and I'd been anticipating her appearance. To put it mildly, I don't love any of the female characters with their pettiness and whining, but I'm expecting Michonne to change that.