Widows & Orphans, Rachael Flynn Mystery Series

When her ultra-ministryminded brother, Joshua, confesses to murder, lawyer Rachael Flynn begs him to let her represent him, certain that he is innocent. But Joshua refuses her offer of counsel. As Rachael works on the case, she begins to suspect that Josh knows who the real killer is, but she is unable to get him to cooperate with his defense. Why won't he talk to her? What is Josh hiding?