noun
title of a book; title of a literary work
Refers to the title of a book or other literary work. Used in formal and academic contexts.
論文の最後に、引用した著書名をすべて記載してください。
Please list all the titles of the books you cited at the end of your paper.
この著書名は聞いたことがあるが、内容は知らない。
I've heard of this book title, but I don't know what it's about.
題名 is a broader term for 'title' of any work (book, movie, painting, etc.), whereas 著書名 is limited to books and literary works.
Compound of 著書 (chosho, 'written work') + 名 (mei, 'name').