Knock Knock (Smog album)

It was originally released through Drag City in January 1999.

Heather Phares of AllMusic gave the album 4.5 out of 5 stars, calling it "Bill Callahan's subtlest collection of songs yet.

"[1] She added, "It's a moving album on many levels; not only do the songs have Smog's usual emotional intimacy, their subjects move away from difficult, claustrophobic situations toward maturity and acceptance.

"[1] Michele Romero of Entertainment Weekly gave the album a grade of B+, saying, "The energy jolt serves him well, making the delicate broken spirit of his lyrics cathartic rather than depressing.

[11] Steve Jelbert of The Independent named it the best pop album of 1999.