BREAKING THE RULE BOOK: On Monday morning, McGraw-Hill bowed to pressures to split its markets and education businesses into two public companies. Analysts are reportedly assigning "negative value" to the education business, according to Barrons. Meanwhile, in a digital kingdom far away from McGraw-Hill's New York City offices, Amazon.com is contemplating launching a Netflix-like service for digital books, says The Wall Street Journal, all of which promises more dramatic changes, especially to the school textbook market. Timely, too, that two George Mason history profs just put the finishing touches on a book they crowd-sourced in a week, titled Hacking the Academy. You can read the digital version now, of course. And the paper version? Wake us when it's out.