lou: search for extra tes extral life, backdrop for thriller from douglas preston, his new book, the aken project, exploring what happens when technology designed to advance mankind begins to turn on its architects. douglas great to have you, congratulation on a new book, a terrific thriller. how does this -- did you decide, why did you decide to make it the center piece of what drives your thriller? >> well, nasa is planning a mission to the great moon of titan, only moon that has oceans. they are of thai methane not the water, they are dropping a boat or a raft into a sea, the kraken sea, perform first extra terrestrial sea voyage, i was thrilled to hear about this mission. the problem is that this raft is going to have be artificially intelligent. a 4 hour trip, through light to you know come go. >> earth to titan and back. so, they can't control the raft from mission control. the raft has to makes it own decision,. lou: hence the ai. >> and well behaveed as we learn from another writer, clark, there is an important set of values that have to be present in that, whether it be hal o