 He was a contributing artist on the "NASCAR/Superman" custom comic and on "Celebrating the Century", a stamp collecting book which DC produced for the United States Postal Service.Ryan briefly returned to Marvel in 1999, teaming again with writer Tom DeFalco, this time on the "Fantastic Five".The turn of the Millennium found Ryan working with Wildstorm, penciling one of the "Left Behind" graphic novels, and working with Crossgen as a fill-in artist on such titles as "Ruse" and "Crux".