Mma Ramotswe shows her usual equipoise in this seventh installment in McCall-Smith's best-selling No. 1 Ladies Detective Agency, confronting a cobra in her office, keeping her trusty assistant on track, and enjoying the domestic life with her new husband. Of course, she also deftly solves a number of intriguing problems brought to her by clients. This series is not only an addictive pleasure but also a window into life and culture and traditions in Botswana.  (BOT25, $12.95)