Just in time for Halloween, we're diving into a new thriller called "Fatal Intrusion." It's the first book in a new series by authors Jeffery Deaver and Isabella Maldonado. After a series of murders in Southern California, a Homeland Security agent needs the help of professor in catching a serial killer. Deaver is an international bestselling author who has written more than 40 books, including  "The Bone Collector." Maldonado is also a Wall Street Journal bestselling author. She graduated from the FBI National Academy and was the first Latina to become a captain within the Fairfax County Police Department near Washington, D.C. Deaver and Maldonado talk about what it's like to co-write a book, how they worked together, and much more.