Hermione's everyday socks with Serenity Sock Weight by Premiere Yarns (Deborah Norville).
The yarn is merino, bamboo, and nylon and it is very soft. For a self-stripping yarn, this one isn't too bad. This is a budget sock yarn from Joann's and if you watch you can pick it up for just a few dollars a ball. There have been a lot of complaints on Ravelry about this yarn, but so far, I haven't run into any big issues. It is a bit splitty, but I'm using my Inox double points and that seems to minimize that problem.
The pattern is pretty easy but because of the self stripping yarn, it is hard to find where you left off. So if I do work on this, I work at least one full repeat of the 4-row repeat.