I scrolled down and found another copy of the same book without the notice…but it was a little weird to come across this

This is cool and all but it is a bit misleading.

The Schwarzschild Radius of a 40GM object is around 790AU, the orbit of Neptune is around 30AU. I’m sure the volume that the object can effect is beyond massive, but the “size” of a SMBH is defined by the point at which not even light can escape, the Schwarzschild Radius.

Still a Schwarzschild Radius of over 26 times the size of Neptune’s orbit is insane.