How does it work?

Yesterday morning on the way to work, NPR was broadcasting an interview with Sheryl Sandberg and her new book Lean In was mentioned and discussed.  Then, when I arrived home, she was on the cover page of the weekly Time magazine that I receive in mail.  At night, I saw Piers Morgan had a piece on her and 60 Minutes a program on her.  How is it that everyone has a program or release about her on the same exact date?  Did they all want to be the first and that was the only way to avoid their content being out dated?  But how do they learn about the timeline and schedule of other competitive media.  Today, TED reshared an old video of her famous talk, "Why we have too few women leaders", on facebook too.  It is as if over night, the world decided to concentrate on her.  What happened? How does it work?

Was her book released yesterday?