The Clasped Weft Join is similar to what I already do when joining a new ball of the same color, where I knit a few stitches with both yarns. But this is better, because it appears to keep everything more snug, and it can be adapted for color changes as well.
Patty Lyons’ Knitting Bag of Tricks is packed full of tricks, tips, information. Now there’s to be an ebook update to fix the fixed format and make the text flow and scale for Kindle. Here’s the video where she explains the update.