Haven't seen this posted anywhere yet. Remember that awesome book about the history of the Mega Drive funded through Kickstarter a couple of years ago? Well, now there is going Dreamcast book as well:
https://www.kickstarter.com/projects/darrenwall/sega-dreamcast-collected-works
I backed the original Mega Drive and to this day it remains one of my most prized possessions. Besides my actual Sega consoles, of course.
Everything was made from high quality materials and contained a tone of obscure information about the Mega Drive, along with interviews from key people involved in both games hardware. As an officially licenced book the Kickstarter team had access to all sorts of archival material from Sega's records.
I'm extremely excited about the whole thing; this will be the definite book about the history of the Dreamcast. There's even a special Shenmue edition variant if you feel liking backing a little extra over the standard price: