Elon Musk was upset Bezos did not invite him to visit Blue Origin's factory, after Bezos toured SpaceX in 2004, a new book says

• Musk's SpaceX and Bezos' Blue Origin have been one-upping each other in a billionaire space race.
• A new biography of Musk says he was upset with Bezos for not receiving a reciprocal invite to tour Blue Origin's factory after Bezos toured SpaceX.
• After that, Bezos sent Musk an invite, and the pair shared a dinner that seemingly did not go over well.

Elon Musk's SpaceX and Jeff Bezos' Blue Origin have long been locked in a billionaire space race.