Conlang book

Is there anyone who has a fairly detailed description of a language (on a web
site, for instance) which I could include in the conlang book I'm working on?

Also, what cases (with descriptions) should I add to this list, which will be
part of the glossary, and what is the difference between sub/superessive and
sub/superlocative?

Nominative
Accusative
Ergative
Absolutive
Genitive
Dative
Allative
Ablative
Elative
Illative
Translative
Superlative
Sublative
Locative
Superlocative
Sublocative
Inlocative
Essive
Inessive
Superessive
Subessive
Comitative
Instrumental
Causative
Inclusive
Exclusive
Prepositional