Book review: Precious and Grace by Alexander McCall Smith

The sixth book I read in 2017 was the seventeenth book in Alexander McCall Smith's No. 1 Ladies' Detective Agency series, Precious and Grace.  The A-plot has to do with a Canadian woman who spent her childhood in Gaborone and has returned looking for her old home, a childhood friend, and the woman who was her nanny, whom she remembers only the by the name Rosie.  In the background, Fanwell acquires a stray dog he can't shake, Violet Sephotho is nominated for Chamber of Commerce Woman of the Year, and the hapless Mr. Polopetsi unknowingly becomes drawn into a pyramid scheme.