I don't know if this is a thing, just not as books but with the "Classes" when you first join the portal you should receive a book which gives you some info on the classes and what commands they may have, for some its world edit I believe. and it should just tell you what staff want to see in your plots and types of builds medieval/modern etc. Just as extra help for new people. It may already be a thing, but I'm not completely sure.
books dont work properly on 1.8, if you are 1.7.10 you get 2 books when joing the hub server with the basic info needed and a quick start guide... more detailed informationis on our wiki also
Also, Staff want to see a nice build not a specific type of build :) Do whatever you like or challenge yourself, and if it looks good in the end you'll be promoted!
But, I don't know if Ive got this right or not but there are certain blocks you need numbers for and world edit things for higher classes its slightly annoying run back and forward to find them. I didn't notice the info D: Thanks tho!