Force of Nature by Jane Harper

Federal Agent Aaron Falk and his partner, Carmen Cooper, become involved in the case of a missing woman named Alice Russell. Alice was possibly going to expose financial wrongdoing at BaileyTennants (the company where she was employed), and Falk and Carmen were working with her on the case. In fact, Alice was with a group of BaileyTennants employees on a corporate wilderness retreat when she disappeared. Did Alice's whistleblowing have something to do with her disappearance, or could possibly the son of serial killer Martin Kovac be involved? Force of Nature is the second book in Aaron Falk series and will be published in February.