Berger writes frequently about World's Fairs, seven of which he has attended, including the Century 21 Exposition in his hometown of Seattle. In 2011, Berger was named "Writer in Residence" at the landmark of the 1962 Century 21 Expo, the Space Needle, in anticipation of the Expo's Fiftieth Anniversary. Commissioned by the owners of the Space Needle, he penned its official history for the anniversary in "Space Needle: The Spirit of Seattle", published in 2012.