Visit Underground Crafter's pattern shop on Ravelry or Etsy for self-published patterns.
Find Underground Crafter (Marie Segares) designs in these publications.
KnitCircus, Fall, 2011 issue
The pattern for Quadrilateral, a broomstick lace shawl, appears in the Fall, 2011 issue of KnitCircus. The magazine is available for viewing online and the pattern collection is available for purchase here.

Inside Crochet (UK), Issue 20, August, 2011
Issue 20 of Inside Crochet includes the Sunshine Blanket (with pillow) pattern. Digital versions are available via Yudu or at Barnes and Noble stores in the U.S.

Crochet World December, 2010 issue
The December, 2010 issue of Crochet World includes three Underground Crafter patterns: the Stocking Cap (in child and adult sizes) and the Snowball Hat & Scarf Set. Visit Crochet World's website to purchase a copy. Errata for the Snowball Hat & Scarf Set can be found here.