Interesting... Mike is the "resident Styxologist" and "official biographer" for the band (and long time friends with Tommy Shaw).. Looks like he got this position around 2014.
Mettler is currently researching and writing the authorized biography of the multiplatinum-selling rock band Styx, and he has also written biographical materials for many other notable internationally renowned recording artists including Foreigner, Tommy Shaw, Don Felder (formerly of the Eagles), Collective Soul, Rik Emmett (formerly of Triumph), Crack The Sky, The Tragically Hip, and the Marshall Tucker Band. He has written liner notes for new albums and historical releases by Styx, Jefferson Airplane, Iron Butterfly, and the Ronnie Montrose estate.
https://kaboomcollective.org/collective/mike-mettler/