In which year did the artist, who illustrated "Multiverse: Exploring Poul Anderson's Worlds" win the Chesley Award for Artistic Achievement?
Multiverse: Exploring Poul Anderson's Worlds:  The book also includes cover art and interior illustrations by Bob Eggleton. Bob Eggleton: Bobera Eggleton (born September 13, 1960) is an American science fiction, fantasy, and horror artist. Bob Eggleton:  He has also won the Chesley Award for Artistic Achievement in 1999 and was the guest of honor at Chicon 2000.
1999