The Crossing Places Book by Elly Griffiths - Paperback Book

A child's bones are discovered near the site of a pre-historic henge on the north Norfolk coast, and the police ask local forensic archaeologist Dr Ruth Galloway to date them. Are these the remains of a  ocal girl who disappeared ten years ago?

DCI Harry Nelson refuses to give up the hunt for this missing child. Ever since she vanished, someone has beens ending him bizarre anonymous notes about ritual sacrifice, quoting Shakespeare and the Bible. He knows Ruth's instincts are experience can hellp him finally put this case to rest. 

Then a second child goes missing, and Ruth finds herself in danger from a killer who knows she's getting ever closed to the truth.