Among our out-of-copyright books are countless unique copies, unusual editions, and neglected or forgotten works.

One should create characteristics that make one's copy "unique" but also instantly recognizable.

It is a unique copy of a treatise on the proper regimen with the toothbrush (siwak).

It was limited to 300 unique copies.

A unique copy of a grammar by Averroes was recently found there.

Doubtless many editions have perished without leaving a trace of their existence, while others are known by unique copies.

Some unique copies of literary work and compilations were also stored inside the Imperial Gardens.

What's more, she makes only one image from each appropriated photograph - unique copies.

The original map (of which this is a unique copy) was last revised in the fourth or early fifth century.

A unique copy may be found in the collection of the British Library.