Book title: Identifies the title of a book.
<book>book title<\book>
Or:
<book|book title|
HelpTag formats book titles using an italic font.
Either of the following two variations:
Refer to <book>The Elements of Style<\book> for further details.
Or:
Refer to <book|The Elements of Style| for further details.
produce:
Refer to The Elements of Style for further details.