The only book of this so-called genre that I've read is The Coldest Winter by Sister Souljah. It was a quick and somewhat interesting read. Oh and I've read Zane (cough), I didn't finish the book though, there was too much sex and I found it redundant and trite. But I know a lot of women who really like Zane's books. And I'm not a prude, it just seemed that Zane's sex scenes had no purpose other than to be sex scenes.
I came across this topic at the blog HomelandColors. He opines on the subject of ghetto lit now and past. I also found on his blog links to a set of stories from National Public Radio on the subject. The second link includes author Terry McMillan's thoughts on the subject. They are both very interesting.
(Just click on the links below to listen)
From NPR's Morning Edition: Readers Embrace 'Ghetto Lit' Genre
From NPR's All Things Considered: Publishing Company Called Out over 'Ghetto Lit'