Book review: The Charming Quirks of Others by Alexander McCall Smith

The sixty-third book I read in 2016 was the seventh installment in Alexander McCall Smith's Isabel Dalhousie series, The Charming Quirks of Others.  Isabel and Cat argue over their respective love lives.  A woman comes on to Jamie, because have we mentioned he's young and hot?  Isabel is asked, despite her complete lack of qualifications, to investigate three candidates for headmaster at a boys' school, one of whom, it has been insinuated in an anonymous letter, has a scandalous past.