Valerie Urniak Cardonza never thought of herself as someone with a nemesis, but now she has two: one who is a threat to her marriage, and another who is a threat to her family. It is Valerie, not her chess-savant son Bobby, who finds herself in a zugzwang , a chess term that means any move will only makes things worse. In Valerie's case, whatever she does may turn out deadly -- but for her, or for Bobby? ZUGZWANG is Book 7 in the Valerie Urniak Mystery series. Other books in this series are: PERMANENT DAMAGE, Book 1 CONTRIVE TO KILL, Book 2 VARIANTS OF DEJA VU, Book 3 A RING OF TRUTH, Book 4 TOO SOON, Book 5 DANGEROUS UNDERCURRENTS, Book 6 ALTERNATE LIVES , Book 8