Here's a link to the chick lit article I wrote for Library Journal back in 2005, which was my entryway to becoming a library expert on women's fiction (editors at Libraries Unlimited had come across my article and that led them to asking me to write the 2 books for them!)
Hip Lit for Hip Chicks
Older titles, but still relevant info.
"Chick lit offers fun, entertaining reading—don't go looking for timeless prose, philosophical musings, or unpredictable plots here!—but that does not completely explain its allure. The genre's aim of eliciting a response of "I'm exactly like that" or "That just happened to me!" has really struck a chord with women in their twenties and thirties who want to be reassured that they are not alone in screwing up their lives—or that screwing up doesn't preclude a happy ending." Read More...