In the latest endearing installment in the bestselling No. 1 Ladies' Detective Agency series, our resourceful heroine, Precious Ramotswe, whose primary mission is to help people with the problems in their lives, has her hands full.   Precious Ramotswe is called in to tackle a disciplinary problem at a local school. Mysteries involving children are always rather difficult, and in this case, making this more complicated is the fact that it's her adopted daughter's school. Meanwhile, her trusted assistant, Grace Makutsi, is having trouble adjusting to wedded bliss, a problem that may test even Precious Ramotswe's formidable talents. Finally, Mma Ramotswe and Mma Makutsi meet an old mentor for the first time, when the estimable Clovis Andersen, author of their personal manual, Principles of Private Investigation , arrives in Botswana on a case. All this and bush tea too--life is indeed rich in Botswana.