When I looked at the cover of 'It great to be an Engine' (2005), I noticed that at the very bottom the font is slightly different from Flange BQ. There are no serifs. If so, look at the photo. In general, if it's sans-serif and looks like Flange BQ, then what is the name of this font? I tried to search MyFonts, but didn't work.

Extension ExtraBold  Sugerida por jerseygirl 

Yea, you're correct. It sort of does look like Flange BQ after all.