(a) speech, talk

dialogue; dissertation

a long written account (e.g. as prepared for a higher university degree)

scholarly thesis

(an instance of) explaining or describing a theory, plan etc

written description

a person's written account of her or his life or experiences

record of experiences

a small paper-covered book, especially on a topic of public interest

booklet

an academic book hat deals with one subject in detail

written study of a subject