It's funny that you think liberals are publishing all of the books. So you're saying that most of the corporations that publish books are liberal? McGraw-Hill(purchased by Apollo Management, CEO Leon Black, supports both Reps and Dems) Houghton Mifflin Harcourt (Linda Zecher, ?) Pearson (John Fallon,?) Penguin-Randon House (Markus Dohle, ?) They all seem to be apolitical to me.
It is out of pure ignorance that anyone thinks their kids are being indoctrinated in public schools. Are there teachers that push an agenda, I would say probably, but that is probably less than 1%. No I don't have a link. My wife is a teacher and her entire agenda is to teach children to read, write, and be able to complete math problems. She teaches 2nd grade. She tries to get as much parental involvement as possible and out of the 19 children, maybe 6 parents show up for anything at the school. They had a literacy program for the entire 2nd grade, 4 classrooms averaging 18 students each, and only 7 sets of parents showed up. So if your kids are being indoctrinated then it is your fault for not being involved in their education. It can't happen if you don't let it happen.
I guess my biggest question to you would be, what are they being indoctrinated in?