I also downloaded the first three books in this series for free during e-book week. I have read all three and enjoyed them very much.
The mysteries keep the reader involved in the plot; each book was different and did not follow the same set formula.
Charlie is a likeable protaganist who would rather do financial investigative work but finds herself dealing with murders occasionally. I will definitely continue to read the rest in the series.
(reviewed 57 days after purchase)