This is a decent summer read--it draws you in and moves quickly (at first), but the last third of the book completely falls apart. Cora becomes too perfect and good, nothing bad really happens to her, and since everything's on tell-don't-show fast-forward mode, you're not emotionally invested in the characters.
I was also disappointed by the Louise Brooks angle. I like reading about old Hollywood, but there's nothing in this book that brings her character to life or provides any emotional insight beyond what one could read on Wikipedia.