Sandman Book 9: The Kindly Ones

Blurb

Distraught by the kidnapping and presumed death of her son, and believing Morpheus to be responsible, Lyta Hall calls the ancient wrath of the Furies down upon him. A former superheroine blames Morpheus for the death of her child and summons an ancient curse of vengeance against the Lord of Dream. The "kindly ones" enter his realm and force a sacrifice that will change the Dreaming forever.