Somebody has written about it.

The cover describes the book as “an in-depth study of the world’s only aikido instructor turned movie star/director/writer/blues guitarist/energy drink inventor — the ass-kicking auteur Steven Seagal. From Above the Law to his Mountain Dew commercials, his entire career is covered in Vern’s inimitable style.” As Vern himself puts it, Seagalogy is “a book that will shake the very foundations of film criticism, break their wrists and then throw them through a window.”

I had his energy drink.
It.
Was.
HORRIBLE.
Steven Seagal is… below my radar.