It is the only volume to have double digit track amounts.

Think of it, he had the only volume of detective stories on the Continent.

Besides, it was the only volume she had found with useful drawings.

In the event this was the only "extra volume" ever published.

The only remaining volume was to have contained a memoir of Stewart, but this he did not live to write.

Its only volume was released on August 27, 2012.

This was the first, and for some time, the only volume on vestibular function in English.

It is the only volume so far that does not feature Colonel Olrik.

The only volume, so far, was published in 2004.

It was Lowell's only volume to contain nothing but free verse.