Another offbeat case for Toronto's gruff, overworked Homicide Inspector John Sanders as he tries to figure out who added cyanide to some herbal tea--drunk with fatal results by German actress Clara voli Hohenkammer during a post. performance party at her lavish home. Sanders is elated when he finds that elusive photographer Harriet Jeffries, subject of his intense but so far unrewarded interest, was a guest at the party. Rich and famous Clara, with her primary career and assets in Germany, had slightly flaky, unmarried daughter Nikki living with her; and handsome drifter nephew Klaus and married daughter Theresa living nearby--Theresa with two children and ambitiOus but dishonest entrepreneurial husband Milan. Clara's day-to, day business was handled by smarmy lover Frank Whitelaw, but, after a plea from Theresa for a big injection of capital into Milan's failing corporation, Clara had scheduled a meeting with her accountants for the day after the party. Meanwhile, Homicide is already busy with a series of highly selective house robberies that resulted in two killings. Connections between these crimes, a terrorist underground, and Clara's murder slowly emerge--with another near murder and a blossoming of the Sanders-Harriet relationship be. fore it's all over. Not quite up to the author's Murder in Focus but solid, nicely plotted and written, moderately engrossing fare.