The $T tag is used once to indicate the title of the book on the title page.
How it works
$T is added before the title with a space.
// Title page
$T His Last Bow
$ST A Reminiscence of Sherlock Holmes
$A Arthur Conan Doyle
$P John Murray Publishers, London, England
$PB
$T His Last Bow
$ST A Reminiscence of Sherlock Holmes
$A Arthur Conan Doyle
$P John Murray Publishers, London, England
$PB