File 31410: Pioneer Courthouse Square
by Gregory Paul Wilhelm
In this case file, the second book in the series, the sister of a famous physicist hires Lydia to find out who killed her brother via unusual circumstances, but somehow Lydia ends up being a target herself. To solve this one, she and her partner, ex-KGB Kris Koskov, enlist the help of the Portland Police, the FBI, her computer whiz son Scott and, last but not least, her best friend Susan.