Openstack Operations Guide - a bit outdated and in need of errata !

I was looking at "Openstack Operations Guide"... (the sampler).
And found a couple of errors at the first glance (in two of the diagrams) ! How can these be corrected ?
I know it's close to impossible to keep up with the rate of development in OpenStack but it may be worth the effort...
The information in the book COULD be very useful if it covered a newer release than Havana (already "grandmother" release).
Some things have changed significantly (Neutron replaced Quantum, for a while, now).
Any chance for a new release ?
Any way we, the bystanders, could help ?
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