This book was originally published under the title Ceremony in August 2021. Dr. Kep Woodhead is a brilliant, irascible forensic toxicologist with a dark past. Bernadette Becker is a disgraced federal investigator with one last chance. They're both assigned to a strange poisoning case: a graduate student has been found dead in a 15th-century chapel, a needle filled with a controversial hallucinogen sticking out of his arm. Many suspects emerge, all with a motive to stop the research project the victim worked on. But can Becker and Woodhead find the truth as events continue to unnerve them—and the killer has them in their sights?