So then why didn't I connect with this one?
I think it's because the narrative moves from the present with Lydia in the bookstore, to moments from her childhood with her father, to the present again with her boyfriend, David, then back to the traumatic incident from her past, to the present mystery with Joey, and back again. And I'm not saying the author doesn't do it well. He does. It's just for me, personally, this narrative style can make me feel like I'm constantly getting yanked between the past and present, so that I never fully connect with either timeline. Which is why I don't love it. But that's just me.
Would I recommend this one? I say, if the plot and that bookstore setting appeal to you, definitely give it a read. Because you just might end up liking it more than me.