So there is research on all types of things but I thought this was amusing. Who could imagine that something as fundamental and supposedly regenerative as sleeping is now regarded as "challenging." Apparently, this guy didn't reflect on the uses of the second bedroom for those with troublesome sleeping partners. By the way, the guy is available for interviews - hopefully he has had a good nights sleep. Here is the amazon page. (I wanted to say something caddy about the rank but it isn't out yet).