No Friendly Drop

When Lord Henry Grayle dies from what appears to be an overdose, an autopsy reveals a tiny, fatal amount of scopolamine. Detective Inspector John Poole is called to the grand house at Tassart to investigate a poisoner with expert knowledge. Before he can uncover the motive or method, a second, more horrifying murder occurs. As shocking revelations emerge from all corners of the house, Poole begins to piece together the truth.