The LA Record describes Longmont Potion Castle's albums as unlike those that most people associate with prank telephone calls, citing that his demeanor is nothing at all like that of The Jerky Boys and Crank Yankers and is actually closer to that of the alternative comedianNeil Hamburger. In a review from the Denver Westword, LPC's recordings are described as advancing "absurdity as an art form." Actor Rainn Wilson, a fan of LPC, has compared his work to "The Marx Brothers at their greatest. There’s a surreal aspect, as if Salvador Dali were doing prank phone calls.” The anonymous artist has himself described the albums he has made as "phone work" or "absurdist" art rather than the less sophisticated label of "prank phone calls", and has also said, "They may be dumb, but they're not stupid". Those on the receiving end of a Longmont Potion Castle call are often left confused and/or extremely angry, as the calls frequently involve complaints about noise, requests for money or offers to "whoop" somebody. However, his calls are rarely very mean-spirited in nature. His recordings combine prank calls with sound collages and his own musical compositions, the majority of which are thrash metal instrumentals. Occasionally, Longmont Potion Castle filters his voice through a Digitech RDS 8000 rack-mounted digital delay unit to produce odd sound effects, thus making whomever he has called even more confused. In 2006, Longmont Potion Castle announced his retirement. In an interview with The Nerve Magazine, he explained that the box set Longbox Option Package would be the final LPC release. However, in 2008 he released a new CD, Longmont Potion Castle Volume 6. In 2009, he released Volume 7. The album featured several celebrity calls, including ones to singer Eddie Money, Jeopardy! host Alex Trebek, and guitarist Rick Derringer. January 2011 saw the release of LPC 8, in which the artist primarily used Skype on a laptop computer to record the calls. In 2016, a crowdfunded documentary on Longmont Potion Castle entitled Where in the Hell is the Lavender House? was announced. Longmont Potion Castle had a brief cameo in the 2018 psychological thriller filmCam as a phone operator.
Longbox Option Package Includes volumes 1–5, Late Eighties Vein, Bonus Disc and Bonus DVD
Longmont Potion Castle Tributes
Ultimate Session Bundle Included virtually every track and video ever produced on a USB thumb drive, included a T-shirt with every album cover as well as a vinyl record. Limited to 50 units total. All 50 sold on first day of availability.
Official Compact Discography Included virtually every track and video ever produced in a collector's box, on 24 CDs and 2 DVDs, included a T-shirt, as well as a detailed booklet. Limited to 25 units total. All 25 sold on first day of availability.
Collaborative releases
Longmont Potion Castle/Hatebeak split 7"
The Albert Lerner Trio/Longmont Potion Castle split double LP