In this the sixth installment of McCall Smith's delightful series our hero Precious Ramotswe, newly married (!) to master mechanic J.L.B. Metekoni, encounters an assortment of troubles, which she handles with her usual aplomb. The book, like all the installments in the No. 1 Ladies Detective Agency series, is imbued with the traditions, folkways and landscapes of Botswana. It's also a lot of fun.  (BOT22, $14.95)