Lincoln Child

"A desperate bargain is broken... Constance Greene confronts Manhattan's most dangerous serial killer, Enoch Leng, bartering for her sister's life -- but she is betrayed and turned away empty-handed, incandescent with rage. A clever trap is set... Unknown to Leng, Pendergast's brother, Diogenes, appears unexpectedly, offering to help--for mysterious reasons of his own. Disguised as a cleric, Diogenes establishes himself in New York's notorious Five...