Covenant of the Dead (Cal Donovan, #8)

Three nuns are murdered in the attic of a Boston convent. There are no witnesses. No shell casings.

The only things missing are their rosaries.

Days later, a Boston medium claims her spirit guide has identified the killer: a broken priest with an antique revolver. A single newspaper column turns that claim into a city-wide witch hunt.

Harvard “pope whisperer” Cal Donovan and former Vatican power broker Elisabetta Celestino step into the city’s séance rooms to test the story.