From the artists’ website:
Character by character, the user types a string. The site finds matching characters in a corpus of texts. Visitors can only type characters matching existing strings. So, as the input grows, the letters slowly dis(and re)appear, until you’re left with a series of letters matching only one chunk of writing. That entry is hyperlinked to the original piece.
It’s a very unusual, and probably impractical, method for navigation, but I thought it might spur some thoughts in the folks here.