Schema.org - Proposed "Literary Works" Classes

Dear Public-Vocabs List,

I started a repository for "literary" classes/properties missing from
Schema.org's "Creative Work" class:
https://github.com/TheatreSean/literary-works/. I would very much
appreciate feedback and comments. Particularly, on the possibility
that work is already being done for including literary classes and/or
my proposed classes can be included into a current proposal.
 
Thanks,

Sean Fraser