This listing includes two signed copies of the book "Star Trek Ghost Walker" by Barbara Hambly, published in 1991. One copy is a hardback with a dust jacket, while the other is a paperback. Both books are signed by the author. This lot features the matching art card number 155 from 1991.. artist Keith Birdsong. The books are part of the Star Trek franchise, originating from the United States, making them a valuable collectible for fans of the series.