A juicy new book reveals the deep rift between Aaron Rodgers and brother Jordan Rodgers. In biographer Ian O’Conner’snew tell-all, Out of the Darkness: The Mystery of Aaron Rodgers, the author details why the quarterback, 40, was noticeably absent during his younger brother’s run on The Bachelorette. During the hometown visits for Season 12, where Jojo Fletcher ultimately chose Jordan in the end, their parents, Ed and Darla, as well as their other sibling Luke Rodgers, appeared to share a meal with the couple. However, two vacant seats were left at the table for Aaron and then-girlfriend Olivi…