Duo (Duo #2)

Kelly Vu and David Kim, partners in both life and science, miraculously survived a horrible attack...but Kelly's body was sacrificed in the process! Now both their consciousnesses live within David's brain, and things only get more complicated as a detective begins investigating David for Kelly's murder. Far above their heads, powerful forces lie in wait for the right moment to finish what they started-and end David and Kelly once and for all.