Suffer the Little Children — Donna Leon

Summoned in the middle of the night to the hospital bed of a respected pediatrician, Commissario Guido Brunetti is confronted with more questions than answers. Three men had burst into the doctor's apartment while his family was sleeping and kidnapped his eighteen-month-old son. What could have motivated an attack so violent that it has left the doctor mute? And could this crime be related to the moneymaking scam run by pharmacists that Brunetti's colleague has recently uncovered? As Brunetti delves deeper into the case, a story of infertility, desperation, and illegal dealings begins to unfold.