Stay Close - Harlan Coben

Coben at his best- fast paced crime thriller. false identities abound, histories are not what they seem and an elderly lady has flashes of lucidity.
When a man is murdered two people who each think the other may be responsible run off and try and build new lives. One almost succeeds, the other returns to the crime scene every year.
Meanwhile one police officer refuses to let go of a seventeen year old case of disappearance.
All tied together fluently resulting in a days worth of reading and a surprise ending.
Excellent read.

Publisher - Orion