You are trolling tonight. Let me guess, you believe ol Bill Oreally has time to write 20+ books let alone actually research, cite and verify his sources????
Cmon man step out of the darkness. He puts his name on a book somebody else writes. ....i doubt he even reads past the dust cover.
That's not uncommon these days to have a staff of researchers, and co-writers. The title of his books say it is co-written. Why are your panties in a wad about this?
Most authors today have to hire researchers to make sure they have their facts in order, so yes, I'm posting facts.