Ever hear the term "title case?" I was googling if book titles on the book cover should be in all caps and kept getting results for "title case." It's how to write the title of a book (not necessarily on the book cover).
It varies somewhat from style guide to style guide, but it's primarily to capitalize the first and last word in the title, all nouns, pronouns, verbs, and adjectives, don't capitalize articles (unless they're the first word of course because of the first rule), and sometimes don't capitalize conjunctions and sometimes do, depending on the conjunction.
I think I was automatically doing what the title case says to do. Well, I may have not capitalized all conjunctions. Or maybe it was all small words. I never gave it any thought. I just did it automatically.
I never did get my answer on book covers. When I look at them on Amazon, almost all of them have all the words in the title capitalized. Not just the first letter in the word, but the entire word. In my current novel, the title is four words: an article, proper noun, preposition, proper noun. I capitalized all the letters in the 1st, 2nd, and 4th words. But the 3rd word is all lower case. It just looks better that way.
Any thoughts on how to write book titles on the book cover?