What format should the title of a book be in?

Question

And how do you know if something is a BOOK, not a NOVEL?

All the places I look for formatting regular book titles say something different. Some places say none at all, some italic, some underlined.

Answer 1

Well, there are different conventions to use. Some use APA style, some MLA style, for reports, etc.
The Chicago Manual of Style or the NY Times Manual of Style and Usage are used by journalists often.
Just depends on which you choose.

"Book" covers a wide variety of materials. In common usage a "Novel" is just a work of fiction although some just use this for longer fiction. Historically, and I guess technically (although this isn't held to in common use), a Novel is a long work of prose fiction, generally more realistic (although definitely not always) and usually epic in scope.
But there are some differences of definitions.

Answer 2

hand write - underline
type - italic