You're at Improbable. Tell us more about how you deal with scaling and dynamic region boundaries. How do you keep message traffic from bottlenecking the system? Can you really get a thousand avatars in a big room and not have the system choke? What would it take to port Second Life / Open Simulator to Spatial OS?
There are a ton of computer graphics intro books. Not so much on big-world architecture.
Maybe I'll write a book about Improbable some day - but more likely about the mythical origin story :) That said, at two different times I managed teams that made demos, tutorials and documentation, most recently https://twitter.com/gabrielgambetta/status/92135876311796121..., but there's people much more qualified than I am to write technical stuff about SpatialOS nowadays.
There are a ton of computer graphics intro books. Not so much on big-world architecture.