Book excerpt: The delightful new installment in Alexander McCall Smith's beloved and bestselling series finds Mma Ramotswe and Mma Makutsi travelling to the north of Botswana, to the stunning Okavango Delta, to visit a safari lodge where there have been several unexplained and troubling events — including the demise of one of the guests. When the two ladies of the No. 1 Ladies' Detective Agency arrive at the Okavango Delta, their eyes are opened, as if for the first time, to the natural beauty and wildlife of their homeland. With teeming wildlife, endless grasslands, and sparkling rivulets of water running in every direction, it is breathtaking. But they can't help being drawn into a world filled with other wildlife: rival safari operators, discontented guides, grumpy hippopotamuses. On top of that, the date has still not been set for Mma Makutsi and Phuti Radiphuti's wedding, and it's safe to say that Mma Makutsi is beginning to grow a bit impatient. And to top it all off, the impossible has happened: one of Mr. J.L.B. Matekoni's apprentices has gotten married…. Of course none of this defeats the indomitable Precious Ramotswe. Good sense, kindness, and copious quantities of red bush tea carry the day &- as they always do.