Author Signed Hardcover Book.  2002 NY: Tor     First edition, first printing, fine in a fine dust jacket, signed by the author, remainder marked.

Signed 1st Edition Mass Market Paperback Book 1986 NY: Avon Paperback Book, first printing, fine (toned, inscribed,) in near-fine pictorial wraps, signed by author.

Signed 1st Edition Mass Market Paperback Book 1969 NY: Ace Paperback Book, first printing, near-fine (toned, torn on back cover near bottom) in near-fine pictorial wraps, signed by Dean R. Koontz.

Author Signed Hardcover Book. July 2021 NY: Flatiron Books First edition, first printing, fine in a fine dust jacket, signed by the author.

Signed 1st Edition Mass Market Paperback Book March 2009 NY: Perseus Publishing Paperback Book, first printing, fine (a few creases on page 12 and 51) in fine pictorial wraps, signed by author.

Author Signed Hardcover Book. 1994 NY: Tor Books First edition, first printing, fine in a fine dust jacket, signed by Ben Bova.

Author Signed Hardcover Book. September 1993 NY: Atheneum First edition, first printing, First edition, first printing, near-fine (discoloration on front page, stains on back inside of dust jacket and back of cover board, bumped corner and spine) in a near-fine dust jacket in archival acetate cover, author signed bookplate on FFEP.

Author Signed Hardcover Book. June 2017 NY: William Morrow First edition, first printing, near-fine (small tear on top right corner, bent corner) in a fine dust jacket, signed by the author, remainder marked.

Author Signed Hardcover Book. May 2023 LON: Pan Macmillan UK First edition, first printing, mint, new/unread in a flawless dust jacket, signed by author.

First Edition Hardcover Book 2000 NY: Pocket First edition, later printing, fine in a fine dust jacket, signed by the author. Each dust jacket is protected in an acid-free archival quality acetate cover.

Author Signed Hardcover Book. November 2020 NY: Tor Books First edition, first printing, mint, new/unread in a flawless dust jacket, signed by the author.

Author Signed Hardcover Book. May 2023 NY: Atria/Emily Bestler Books First edition, first printing, mint, new/unread in a flawless dust jacket, signed by author.

Author Signed Hardcover Book. May 2023 NY: Orbit First edition, first printing, mint, new/unread in a flawless dust jacket, signed by author.

Author Signed Hardcover Book. May 2023 LON: Head of Zeus. UK first edition, first printing, mint, new/unread in a flawless dust jacket, signed by the author.

Author Signed Hardcover Book  October 17, 2019 NY: Viking  First edition, first printing, mint, new/unread in a flawless dust jacket, signed by the author.

Author Signed Hardcover Book. February 2023 NY: Harper Voyager First edition, first printing, mint, new/unread in a flawless dust jacket, signed by author.

Author Signed Hardcover Book. May 2023 NY: Tordotcom First edition, first printing, mint, new/unread in a flawless dust jacket, signed by author.

Author Signed Hardcover Book. May 2023 NY: William Morrow First edition, first printing, mint, new/unread in a flawless dust jacket, signed by author.

Author Signed Hardcover Book. May 2023 NY: Ballantine Books First edition, first printing, mint, new/unread in a flawless dust jacket, signed by author.

Author Signed Hardcover Book. May 2023 NY: Atria/Emily Bestler Books First edition, first printing, mint, new/unread in a flawless dust jacket, signed by author.

Author Signed Hardcover Book. May 2023 LON: Penguin Random House Children's UK First edition, first printing, mint, new/unread in a flawless dust jacket, signed by Rick Riordan.

Author Signed Hardcover Book. May 2023 NY: Tor Books First edition, first printing, mint, new/unread in a flawless dust jacket, signed by author.

Author Signed UK Hardcover Book May 2016 LON: Picador First UK edition, first printing, mint, new/unread in a flawless dust jacket, signed by author.

Author Signed Hardcover Book.  1993 NY: Delacorte  First edition, first printing, near-fine (spots on front board) in a fine dust jacket, signed by author.

Author Signed Hardcover Book.  1993 NY: Delacorte  First edition, first printing, fine in a fine dust jacket, signed by author.

Author Signed Hardcover Book.  2017 NY: Grove Atlantic First edition, first printing, fine in a fine dust jacket, signed by author.

Author Signed UK Hardcover Book  February 2023 LON: Penguin Books Ltd First UK edition, first printing, near-fine (badly bumped spine along top) in a fine dust jacket, signed by author.

Author Signed UK Hardcover Book  February 2023 LON: Penguin Books Ltd First UK edition, first printing, near-fine (torn spine along bottom) in a fine dust jacket, signed by author.

Author Signed UK Hardcover Book  October 2022 LON: Orion First UK edition, first printing, near-fine (badly bumped spine and barely noticeable water damage) in a fine dust jacket, signed by author.

Author Signed Hardcover Book. 1999 NY: Penguin First edition, first printing, mint, new/unread in a flawless dust jacket, signed by the author.