Welcome Douglas Preston and Lincoln Child

Who is Dr. Leng and what experiments and worse does he carry out? Why is Constance living in 1880 and what unusual and dire methods is Pendergast employing to find her?  What about the 2 murders in the Rosebud Reservation and the museum of natural history? How are they connected? Just why was the curator killed and who killed the Indian on the reservation? How do they link together and what about the machine that might change it all for Pendergast and why? John me for this interview.