And yes, Thanks for Halo.
Dean Takahashi has a fascinating story on the making of XBOX based upon his books Opening the Xbox: Inside Microsoft’s Plan to Unleash an Entertainment Revolution, published in 2002; and The Xbox 360 Uncloaked: The real story behind Microsoft’s next generation video game console, published in 2006 and some recent interviews.
The making of the Xbox: How Microsoft unleashed a video game revolution (part 1)