The Number One Ladies Dectective Agency by Scottish author Alexander McCall Smith.
Mma Precious Ramotswe, a traditionally built lady, runs a detective agency with her assistant and secretary ma Makusti. Mma Ramotswe is married to mr. JLB Matekoni after a long term engagement. They have two adopted children, Motholele and Puso.
Mr. JLB Matekoni owns a garage with his two assistants, Charlie and Fanwell.