Missing 411

An author, David Paulides, has written four books about mysterious disappearances in the United States, some of them are quite bizarre, several have common characteristics.

Some of the disappearances have take place in the Upper Peninsula of Michigan, where I'm from.  What could be going on?  Is there a portal or vortex opening up?  If so, where are these people going?  Is there a cover up in our national parks?