Alexander McCall Smith 
The Limpopo Academy Of Private Detection 

THE THIRTEENTH BOOK IN THE BELOVED NO. 1 LADIES” DETECTIVE AGENCY SERIES
The one where Mma Ramotswe meets her hero . . .
Mma Ramotswe, normally a peaceful sleeper, finds her slumbers disturbed by dreams of a tall stranger – but she is not quite ready to learn what this vision portends.
Soon even Mma Makutsi has to admit that untoward things are occurring around the No. 1 Ladies” Detective Agency: at Speedy motors, Fanwell finds himself in trouble with the law, and the indomitable Mma Potokwani disappears from the orphan farm.
Armed with courage, kindness and an instinct for the truth, Mma Ramotswe sets out to restore order . . .