Robert Paul "Tad" Williams is an American fantasy and science fiction writer, born on March 14, 1957. He is renowned for his multivolume series such as Memory, Sorrow, and Thorn, Otherland, Shadowmarch, and The Bobby Dollar series. He has also authored standalone novels like Tailchaser's Song and The War of the Flowers.

Recently, Williams published The Last King of Osten Ard series, with the final novel, The Navigator's Children, set for publication in 2024. Over 17 million copies of his works have been sold worldwide.

In the realm of comics, Williams worked on a six-issue mini-series for DC Comics called The Next and wrote Aquaman: Sword of Atlantis from issue #50 to #57. Additionally, he has contributed to other comics such as Mirrorworld: Rain and The Helmet of Fate: Ibis the Invincible #1 (DC).

Williams collaborated with his wife, Deborah Beale, on a series of young-adult books titled The Ordinary Farm Adventures. The series includes The Dragons of Ordinary Farm and The Secrets of Ordinary Farm.

Living in the Santa Cruz mountains, Tad Williams is a California-based fantasy superstar whose works have influenced a generation of writers. His books have been translated into twenty-five languages and have inspired various adaptations, including the relaunch of the Otherland epic as an MMO.