Say You're Sorry is the 4th or 5th Michael Robotham thriller I've read, and I will never tire of them. Well paced, full of clever twists and humanity in very dark situations. The characterisation is especially good and "very real". 
 Unlike other reviewers, I didn't work out who the kidnapper was until just before it was actually revealed. He was 1 of 3 of "my suspects". 
 Love it