Letty Whittaker 02-The One We Love

2. The One We Love (2012)
Following the sudden death of a co-worker, psychotherapist Letty Whittaker learns she has “inherited” her colleague’s case load. As professional executor, Letty assumes responsibility for Regina’s clients, including those from Devlin House, the local domestic abuse shelter where Regina had worked . . . and died.
As Letty takes up her duties, she makes some disturbing discoveries: a set of files that Regina had stolen from the shelter; an AWOL resident, missing since the morning after Regina’s death; an ethics complaint Regina had made against an unnamed peer. 
Are the files—or the abused women they represented—connected with Regina’s death? Is the missing client on the run from her abusive husband or somebody even scarier? Who was Regina reporting to the state licensing board, and why?
And, more importantly, just what kind of trouble has Letty really inherited?