Many other reviewers seem quite put out with Corrie. I think if one has read the series in order and, so, encountered Corrie from early on, her conduct in this book is not surprising in the least. She is willful; she is stubborn beyond belief; and she is independent to a fault. All of these character faults flow from her background. The fact that Pendergast 'rescued' her and set her on a good path cannot erase 15 or more years of life. Further, although she seems to 'resent' - to use others' word - P at times, she really worships him. Her so-called resentment grows from two, possibly conflicting, roots: (1) she wants to be more to him than someone he bails out of trouble now and then; (2) she wants to succeed on her own as much as she can. Thus, she wants both more and less from him.
All in all, I enjoyed reading this book. The series is uneven, in my opinion, but that is not entirely novel in such series. I have gotten a bit tired of P's family saga - or sagas - so this was a nice return to a non-Pendergast-brood mystery. And, for all her faults, I like Corrie. As a college professor, I know that 20-somethings can seem to be both impressively mature and exasperatingly immature. Corrie is not an anomaly in this respect. She is brave and intelligent. That she sometimes does foolish or 'stupid' things is perfectly normal.