The Empty Chair — Jeffery Deaver

Lincoln Rhyme, the renowned criminalist from The Bone Collector and The Coffin Dancer, faces his ultimate opponent: a kidnapper and murderer dubbed the Insect Boy. But Rhyme is in for a surprise when he learns that catching a criminal is one thing ... keeping him is another. Now Rhyme finds himself hunting a ruthless killer in the heart of a southern swampland--and going head-to-head with his protege, Amelia Sachs, in a rivalry that tests the limits of both their expertise and their love.