does bentley make a book for these cars i have one for my 325 but it does not cover the m3 (motor anyways)

No, I don't think they made one specifically for the M3, at least I haven't seen one. It's a shame that it doesn't cover topics specific to the M3.

I believe your are correct, I have only seen the E30 manual but not M3 specific. Jet maybe you could start a movement with Bentley to produce an M3 specific manual, strenght in numbers you know. 3

There aren't any M3 specific repair manuals published. You can find BMW factory repair manuals on ebay from time to time (big $) or you can get the Koala Motorsports CD, covers quite a bit about the M3 and with a standard E30 bentley you should be able to get most projects done.