Let 'Em Know was the final EP released by Papa Roach in 1999. Each track would later be revamped for their first major label album, Infest (2000) (with "Tightrope" appearing as a hidden track at the end of the album and "Legacy" being only on the clean version and the UK version of the album), excluding "Walking Thru Barbed Wire" which would appear on the next album, Lovehatetragedy (2002).

After this release, the band would later sign with Dreamworks Records, and release their 3x platinum album, Infest, in 2000.