Karin Slaughter's new novel is an epic tale of love, loyalty, and murder that encompasses forty years, two chillingly similar murder cases, and a good man's deepest secrets.   Will Trent is a brilliant agent with the Georgia Bureau of Investigation. Newly in love, he is beginning to put a difficult past behind him. Then a local college student goes missing, and Will is inexplicably kept off the case by his supervisor and mentor, deputy director Amanda Wagner. Will cannot fathom Amanda's motivation until the two of them literally collide in an abandoned orphanage they have both been drawn to for different reasons. Decades before--when Will's father was imprisoned for murder--this was his home. . . .   Flash back nearly forty years. In the summer Will Trent was born, Amanda Wagner is going to college, making Sunday dinners for her father, taking her first steps in the boys' club that is the Atlanta Police Department. One of her first cases is to investigate a brutal crime in one of the city's worst neighborhoods. Amanda and her partner, Evelyn, are the only ones who seem to care if an arrest is ever made.   Now the case that launched Amanda's career has suddenly come back to life, intertwined with the long-held mystery of Will's birth and parentage. And these two dauntless investigators will each need to face down demons from the past if they are to prevent an even greater terror from being unleashed.   A masterpiece of character, atmosphere, and riveting suspense, Criminal is the most powerful and moving novel yet from one of our most gifted storytellers at work today. Advance praise for  Criminal   "Karin Slaughter's best yet by far: All her signature strengths are amplified a hundredfold by the past explaining the present. Reading this book was like watching a great athlete having a career year."--Lee Child   "Fascinating . . . Slaughter delivers another riveting, pulse-pounding crime novel."-- Booklist  (starred review)