The yarn colors might be discontinued. I don't have the book, but I know that happens a lot. If you can't find the colors, I would just find the closest you can. For 7 mesh, use a 4 ply acrylic, worsted weight yarn. Red Heart Super Saver, Classic, and Love are three brands you can look for. Also, Bernat Super Value is another that works well. Needloft is another brand and it's made especially for 7 mesh plastic canvas.
Hope this help!
Lissa