The YarnSub April roundup has a summary of all the new and recently discontinued yarns as well as a summary of the knitting and crochet books published during the last month.
Wendy Peterson, creator of YarnSub.com recently appeared on the Knit Picks podcast. You can hear how and why Wendy created YarnSub and find out more about how you can make best use of the site. Knit Picks podcast episode 339 – Yarn Substitutions.