A Room Full of Bones (Ruth Galloway Series, Book #4) by Griffiths, Elly - 2012

When Ruth Galloway arrives to supervise the opening of a coffin containing the bones of a medieval bishop, she finds the museum's curator lying dead on the floor. Soon after, the museum's wealthy owner is also found dead, in his stables.

These two deaths could be from natural causes, but once again Ruth and DCI Harry Nelson cross paths during the investigation. When threatening letters come to light, events take an even more sinister turn. But as Ruth's friends become involved, where will her loyalties lie? As her convictions are tested, Ruth and Nelson must discover how Aboriginal skulls, drug smuggling, and the mystery of "The Dreaming" hold the answers to these deaths, as well as the keys to their own survival.