The weird thing is: On German Amazon, I've acquired a middle initial W. On U.S. Amazon until they fixed it, and still on BarnesandNoble.com, for Illumination I've been listed with a middle initial M. Neither W nor M is my middle initial, and I've never used my middle initial in my byline (although I think some magazine printed it once, for some reason I never got to the bottom of).
I can kind of see the M; it's the sort of typo you'd make when you start typing the last name, get distracted, then come back and type the last name in from scratch, leaving the first letter of the aborted attempt as a vestigial middle initial. But the W is a mystery to me.
It's the constellation Cassiopeia of middle initials.
I've been twmed.