Ngaoi Marsh: Spinsters in Jeopardy

I'd forgotten this one, had to return it today because it was late. Bad Bani. It's not one of Marsh's best, but it had it's moments - not that I remember them well now, so they can't have been that great... Alleyn and Troy and their six-year-old son are on a holiday in France, which they've combined with work for Alleyn. The two missions (holiday and work) happen to come together when Troy is accidentally introduced to the mansion where the drug-dealing cult is based. And then their son is kidnapped. But it's all very British stiff-upper-lip in places.