Here is a signed, first edition copy of 'Sin Quest" by "Don Elliott". I was confused at first because the signature does not match the author's name but then I did some research.
Don Elliott is one of many pseudonyms used by well known science fiction writer Robert Siverberg and that is who signed it.
It is in used condition.
The book is in great shape, no rips, rabbit ears or missing pages. It does have a small ding on the spine(pic 6) and a couple marks on the back cover(pic 2). but overall doesn't look like it's been read much.
Robert Silverberg (born January 15, 1935) is an American author and editor, best known for writing science fiction. He is a multiple winner of both Hugo and Nebula Awards, a member of the Science Fiction and Fantasy Hall of Fame, and a Grand Master of SF. He has attended every Hugo Awards ceremony since the inaugural event in 1953.
In 1959, the market for science fiction collapsed and Silverberg turned his ability to write copiously to other fields, from historical non-fiction to softcore pornography.